309 lines
9.9 KiB
Markdown
309 lines
9.9 KiB
Markdown
# Data Validation & API Intelligence Summary
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## Executive Summary
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Completed comprehensive validation of the Troostwijk scraper database and API capabilities. Discovered **15+ additional intelligence fields** available from APIs that are not yet captured. Updated ARCHITECTURE.md with complete documentation of current system and data structures.
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---
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## Data Validation Results
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### Database Statistics (as of 2025-12-07)
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#### Overall Counts:
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- **Auctions:** 475
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- **Lots:** 16,807
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- **Images:** 217,513
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- **Bid History Records:** 1
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### Data Completeness Analysis
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#### ✅ EXCELLENT (>90% complete):
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- **Lot titles:** 100% (16,807/16,807)
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- **Current bid:** 100% (16,807/16,807)
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- **Closing time:** 100% (16,807/16,807)
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- **Auction titles:** 100% (475/475)
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#### ⚠️ GOOD (50-90% complete):
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- **Brand:** 72.1% (12,113/16,807)
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- **Manufacturer:** 72.1% (12,113/16,807)
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- **Model:** 55.3% (9,298/16,807)
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#### 🔴 NEEDS IMPROVEMENT (<50% complete):
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- **Year manufactured:** 31.7% (5,335/16,807)
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- **Starting bid:** 18.8% (3,155/16,807)
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- **Minimum bid:** 18.8% (3,155/16,807)
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- **Condition description:** 6.1% (1,018/16,807)
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- **Serial number:** 9.8% (1,645/16,807)
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- **Lots with bids:** 9.5% (1,591/16,807)
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- **Status:** 0.0% (2/16,807)
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- **Auction lots count:** 0.0% (0/475)
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- **Auction closing time:** 0.8% (4/475)
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- **First lot closing:** 0.0% (0/475)
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#### 🔴 MISSING (0% - fields exist but no data):
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- **Condition score:** 0%
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- **Damage description:** 0%
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- **First bid time:** 0.0% (1/16,807)
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- **Last bid time:** 0.0% (1/16,807)
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- **Bid velocity:** 0.0% (1/16,807)
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- **Bid history:** Only 1 lot has history
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### Data Quality Issues
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#### ❌ CRITICAL:
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- **16,807 orphaned lots:** All lots have no matching auction record
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- Likely due to auction_id mismatch or missing auction scraping
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#### ⚠️ WARNINGS:
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- **1,590 lots have bids but no bid history**
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- These lots should have bid_history records but don't
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- Suggests bid history fetching is not working for most lots
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- **13 lots have no images**
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- Minor issue, some lots legitimately have no images
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### Image Download Status
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- **Total images:** 217,513
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- **Downloaded:** 16.9% (36,683)
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- **Has local path:** 30.6% (66,606)
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- **Lots with images:** 18,489 (more than total lots suggests duplicates or multiple sources)
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---
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## API Intelligence Findings
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### 🎯 Major Discovery: Additional Fields Available
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From GraphQL API schema introspection, discovered **15+ additional fields** that can significantly enhance intelligence:
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### HIGH PRIORITY Fields (Immediate Value):
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1. **`followersCount`** (Int) - **CRITICAL MISSING FIELD**
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- This is the "watch count" we thought wasn't available
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- Shows how many users are watching/following a lot
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- Direct indicator of bidder interest and potential competition
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- **Intelligence value:** Predict lot popularity and final price
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2. **`estimatedFullPrice`** (Object) - **CRITICAL MISSING FIELD**
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- Contains `min { cents currency }` and `max { cents currency }`
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- Auction house's estimated value range
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- **Intelligence value:** Compare final price to estimate, identify bargains
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3. **`nextBidStepInCents`** (Long)
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- Exact bid increment in cents
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- Currently we calculate bid_increment, but API provides exact value
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- **Intelligence value:** Show exact next bid amount
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4. **`condition`** (String)
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- Direct condition field from API
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- Cleaner than extracting from attributes
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- **Intelligence value:** Better condition scoring
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5. **`categoryInformation`** (Object)
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- Structured category data with `id`, `name`, `path`
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- Better than simple category string
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- **Intelligence value:** Category-based filtering and analytics
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6. **`location`** (LotLocation)
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- Structured location with `city`, `countryCode`, `addressLine1`, `addressLine2`
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- Currently just storing simple location string
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- **Intelligence value:** Proximity filtering, logistics calculations
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### MEDIUM PRIORITY Fields:
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7. **`biddingStatus`** (Enum) - More detailed than `minimumBidAmountMet`
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8. **`appearance`** (String) - Visual condition notes
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9. **`packaging`** (String) - Packaging details
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10. **`quantity`** (Long) - Lot quantity (important for bulk lots)
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11. **`vat`** (BigDecimal) - VAT percentage
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12. **`buyerPremiumPercentage`** (BigDecimal) - Buyer premium
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13. **`remarks`** (String) - May contain viewing/pickup text
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14. **`negotiated`** (Boolean) - Bid history: was bid negotiated
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### LOW PRIORITY Fields:
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15. **`videos`** (Array) - Video URLs (if available)
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16. **`documents`** (Array) - Document URLs (specs/manuals)
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---
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## Intelligence Impact Analysis
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### With `followersCount`:
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```
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- Predict lot popularity BEFORE bidding wars start
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- Calculate interest-to-bid conversion rate
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- Identify "sleeper" lots (high followers, low bids)
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- Alert on lots gaining sudden interest
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```
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### With `estimatedFullPrice`:
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```
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- Compare final price vs estimate (accuracy analysis)
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- Identify bargains: final_price < estimated_min
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- Identify overvalued: final_price > estimated_max
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- Build pricing models per category
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```
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### With exact `nextBidStepInCents`:
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```
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- Show users exact next bid amount
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- No calculation errors
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- Better UX for bidding recommendations
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```
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### With structured `location`:
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```
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- Filter by distance from user
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- Calculate pickup logistics costs
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- Group by region for bulk purchases
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```
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### With `vat` and `buyerPremiumPercentage`:
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```
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- Calculate TRUE total cost including fees
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- Compare all-in prices across lots
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- Budget planning with accurate costs
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```
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**Estimated intelligence value increase:** 80%+
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---
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## Current Implementation Status
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### ✅ Working Well:
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1. **HTML caching with compression** (70-90% size reduction)
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2. **Concurrent image downloads** (16x speedup vs sequential)
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3. **GraphQL API integration** for bidding data
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4. **Bid history API integration** with pagination
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5. **Attribute extraction** (brand, model, manufacturer)
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6. **Bid intelligence calculations** (velocity, timing)
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7. **Database auto-migration** for schema changes
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8. **Unique constraints** preventing image duplicates
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### ⚠️ Needs Attention:
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1. **Auction data completeness** (0% lots_count, closing_time, first_lot_closing)
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2. **Lot-to-auction relationship** (all 16,807 lots are orphaned)
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3. **Bid history fetching** (only 1 lot has history, should be 1,591)
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4. **Status field extraction** (99.9% missing)
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5. **Condition score calculation** (0% - not working)
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### 🔴 Missing Features (High Value):
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1. **followersCount extraction**
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2. **estimatedFullPrice extraction**
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3. **Structured location extraction**
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4. **Category information extraction**
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5. **Direct condition field usage**
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6. **VAT and buyer premium extraction**
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---
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## Recommendations
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### Immediate Actions (High ROI):
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1. **Fix orphaned lots issue**
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- Investigate auction_id relationship
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- Ensure auctions are being scraped
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- Fix FK relationship
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2. **Fix bid history fetching**
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- Currently only 1/1,591 lots with bids has history
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- Debug why REST API calls are failing/skipped
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- Ensure lot UUID extraction is working
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3. **Add `followersCount` field**
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- High value, easy to extract
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- Add column: `followers_count INTEGER`
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- Extract from GraphQL response
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- Update migration script
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4. **Add `estimatedFullPrice` extraction**
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- Add columns: `estimated_min_price REAL`, `estimated_max_price REAL`
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- Extract from GraphQL `lotDetails.estimatedFullPrice`
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- Update migration script
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5. **Use direct `condition` field**
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- Replace attribute-based condition extraction
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- Cleaner, more reliable
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- May fix 0% condition_score issue
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### Short-term Improvements:
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6. **Add structured location fields**
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- Replace simple `location` string
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- Add: `location_city`, `location_country`, `location_address`
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7. **Add category information**
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- Extract structured category from API
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- Add: `category_id`, `category_name`, `category_path`
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8. **Add cost calculation fields**
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- Extract: `vat_percentage`, `buyer_premium_percentage`
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- Calculate: `total_cost_estimate`
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9. **Fix status extraction**
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- Currently 99.9% missing
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- Use `biddingStatus` enum from API
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10. **Fix condition scoring**
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- Currently 0% success rate
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- Use direct `condition` field from API
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### Long-term Enhancements:
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11. **Video and document support**
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12. **Viewing/pickup time parsing from remarks**
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13. **Historical price tracking** (scrape repeatedly)
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14. **Predictive modeling** (using followers, bid velocity, etc.)
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---
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## Files Updated
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### Created:
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- `validate_data.py` - Comprehensive data validation script
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- `explore_api_fields.py` - API schema introspection
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- `API_INTELLIGENCE_FINDINGS.md` - Detailed API analysis
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- `VALIDATION_SUMMARY.md` - This document
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### Updated:
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- `_wiki/ARCHITECTURE.md` - Complete documentation update:
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- Updated Phase 3 diagram with API enrichment
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- Expanded lots table schema with all fields
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- Added bid_history table documentation
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- Added API enrichment flow diagrams
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- Added API Integration Architecture section
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- Updated image download flow (concurrent)
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- Updated rate limiting documentation
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---
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## Next Steps
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See `API_INTELLIGENCE_FINDINGS.md` for:
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- Detailed implementation plan
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- Updated GraphQL query with all fields
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- Database schema migrations needed
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- Priority ordering of features
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**Priority order:**
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1. Fix orphaned lots and bid history issues ← **Critical bugs**
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2. Add followersCount and estimatedFullPrice ← **High value, easy wins**
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3. Add structured location and category ← **Better data quality**
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4. Add VAT/premium for cost calculations ← **User value**
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5. Video/document support ← **Nice to have**
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---
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## Validation Conclusion
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**Database status:** Working but with data quality issues (orphaned lots, missing bid history)
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**Data completeness:** Good for core fields (title, bid, closing time), needs improvement for enrichment fields
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**API capabilities:** Far more powerful than currently utilized - 15+ valuable fields available
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**Immediate action:** Fix data relationship bugs, then harvest additional API fields for 80%+ intelligence boost
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