feat(33-02): generate migration for market_prices, community_prices tables
- CREATE TABLE market_prices with unique(global_item_id, market, currency)
- CREATE TABLE community_prices with unique(global_item_id, user_id, source_type)
- ALTER TABLE items ADD COLUMN price_currency
- ALTER TABLE thread_candidates ADD COLUMN found_price_cents, found_price_currency, found_price_date
- Note: db:push requires running PostgreSQL — apply on deployment
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>