lib/db (env-guarded postgres-js), lib/orders-store (createOrder/getOrder/listOrders/setStatus, DB-or-memory), /api/orders (POST create+estimate, GET list), /api/orders/[id] (GET, PATCH status with escrow-safe state machine). Activates fully on DATABASE_URL/POSTGRES_URL. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>