Fix database schema: Change auction_id and lot_id from BIGINT to TEXT

The scraper uses TEXT IDs like "A7-40063-2" but DatabaseService was creating
BIGINT columns, causing PRIMARY KEY constraint failures on the server.

Changes:
- auction_id: BIGINT -> TEXT PRIMARY KEY
- lot_id: BIGINT -> TEXT PRIMARY KEY
- sale_id: BIGINT -> TEXT
- Added UNIQUE constraints on URLs
- Added migration script (fix-schema.sql)

This fixes the "UNIQUE constraint failed: auctions.auction_id" errors
and allows bid data to populate correctly on the server.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

fix-schema.sql

@@ -0,0 +1,128 @@
+-- Schema Fix Script for Server Database
+-- This script migrates auction_id and lot_id from BIGINT to TEXT to match scraper format
+-- The scraper uses TEXT IDs like "A7-40063-2" but DatabaseService.java was creating BIGINT columns
+
+-- Step 1: Backup existing data
+CREATE TABLE IF NOT EXISTS auctions_backup AS SELECT * FROM auctions;
+CREATE TABLE IF NOT EXISTS lots_backup AS SELECT * FROM lots;
+CREATE TABLE IF NOT EXISTS images_backup AS SELECT * FROM images;
+
+-- Step 2: Drop existing tables (CASCADE would drop foreign keys)
+DROP TABLE IF EXISTS images;
+DROP TABLE IF EXISTS lots;
+DROP TABLE IF EXISTS auctions;
+
+-- Step 3: Recreate auctions table with TEXT primary key (matching scraper format)
+CREATE TABLE auctions (
+    auction_id TEXT PRIMARY KEY,
+    title TEXT NOT NULL,
+    location TEXT,
+    city TEXT,
+    country TEXT,
+    url TEXT NOT NULL UNIQUE,
+    type TEXT,
+    lot_count INTEGER DEFAULT 0,
+    closing_time TEXT,
+    discovered_at INTEGER
+);
+
+-- Step 4: Recreate lots table with TEXT primary key (matching scraper format)
+CREATE TABLE lots (
+    lot_id TEXT PRIMARY KEY,
+    sale_id TEXT,
+    auction_id TEXT,
+    title TEXT,
+    description TEXT,
+    manufacturer TEXT,
+    type TEXT,
+    year INTEGER,
+    category TEXT,
+    current_bid REAL,
+    currency TEXT DEFAULT 'EUR',
+    url TEXT UNIQUE,
+    closing_time TEXT,
+    closing_notified INTEGER DEFAULT 0,
+    starting_bid REAL,
+    minimum_bid REAL,
+    status TEXT,
+    brand TEXT,
+    model TEXT,
+    attributes_json TEXT,
+    first_bid_time TEXT,
+    last_bid_time TEXT,
+    bid_velocity REAL,
+    bid_increment REAL,
+    year_manufactured INTEGER,
+    condition_score REAL,
+    condition_description TEXT,
+    serial_number TEXT,
+    damage_description TEXT,
+    followers_count INTEGER DEFAULT 0,
+    estimated_min_price REAL,
+    estimated_max_price REAL,
+    lot_condition TEXT,
+    appearance TEXT,
+    estimated_min REAL,
+    estimated_max REAL,
+    next_bid_step_cents INTEGER,
+    condition TEXT,
+    category_path TEXT,
+    city_location TEXT,
+    country_code TEXT,
+    bidding_status TEXT,
+    packaging TEXT,
+    quantity INTEGER,
+    vat REAL,
+    buyer_premium_percentage REAL,
+    remarks TEXT,
+    reserve_price REAL,
+    reserve_met INTEGER,
+    view_count INTEGER,
+    bid_count INTEGER,
+    viewing_time TEXT,
+    pickup_date TEXT,
+    location TEXT,
+    scraped_at TEXT,
+    FOREIGN KEY (auction_id) REFERENCES auctions(auction_id),
+    FOREIGN KEY (sale_id) REFERENCES auctions(auction_id)
+);
+
+-- Step 5: Recreate images table
+CREATE TABLE images (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    lot_id TEXT,
+    url TEXT,
+    local_path TEXT,
+    labels TEXT,
+    processed_at INTEGER,
+    downloaded INTEGER DEFAULT 0,
+    FOREIGN KEY (lot_id) REFERENCES lots(lot_id)
+);
+
+-- Step 6: Create bid_history table if it doesn't exist
+CREATE TABLE IF NOT EXISTS bid_history (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    lot_id TEXT,
+    bid_amount REAL,
+    bid_time TEXT,
+    is_autobid INTEGER DEFAULT 0,
+    bidder_id TEXT,
+    bidder_number INTEGER,
+    FOREIGN KEY (lot_id) REFERENCES lots(lot_id)
+);
+
+-- Step 7: Restore data from backup (converting BIGINT to TEXT if needed)
+INSERT OR IGNORE INTO auctions SELECT * FROM auctions_backup;
+INSERT OR IGNORE INTO lots SELECT * FROM lots_backup;
+INSERT OR IGNORE INTO images SELECT * FROM images_backup;
+
+-- Step 8: Create indexes for performance
+CREATE INDEX IF NOT EXISTS idx_auctions_country ON auctions(country);
+CREATE INDEX IF NOT EXISTS idx_lots_sale_id ON lots(sale_id);
+CREATE INDEX IF NOT EXISTS idx_lots_auction_id ON lots(auction_id);
+CREATE INDEX IF NOT EXISTS idx_images_lot_id ON images(lot_id);
+
+-- Step 9: Clean up backup tables (optional - comment out if you want to keep backups)
+-- DROP TABLE auctions_backup;
+-- DROP TABLE lots_backup;
+-- DROP TABLE images_backup;