Migrate from Prisma to Drizzle ORM

Co-Authored-By: Oz <oz-agent@warp.dev>

AGENTS.md

@@ -4,7 +4,7 @@ Guidelines for AI coding agents working on this repository.
 
 ## Project Overview
 
-TypeScript-based scraper for Russian supermarkets (Magnit). Uses Playwright for sessions, Axios for API, PostgreSQL with Prisma ORM.
+TypeScript-based scraper for Russian supermarkets (Magnit). Uses Playwright for sessions, Axios for API, PostgreSQL with Drizzle ORM.
 
 ## Build & Run Commands
 
@@ -20,12 +20,13 @@ pnpm enrich                           # Run product enrichment
 pnpm test-db                          # Test database connection
 ```
 
-### Prisma Commands
+### Drizzle Commands
 
 ```bash
-pnpm prisma:generate    # Generate client after schema changes
-pnpm prisma:migrate     # Create and apply migrations
-pnpm prisma:studio      # Open database GUI
+pnpm db:generate    # Generate migration files
+pnpm db:migrate     # Apply migrations
+pnpm db:push        # Push schema changes directly (dev only)
+pnpm db:studio      # Open database GUI
 ```
 
 ### Running Scripts Directly
@@ -45,13 +46,15 @@ No test framework configured. Manual testing via `pnpm test-db`, `pnpm dev`, Pri
 
 1. External packages first, then internal modules
 2. **Always include `.js` extension** for local imports (ESM)
-3. Use named imports from Prisma client
+3. Use named imports from Drizzle schema
 
 ```typescript
 import { chromium, Browser } from 'playwright';
 import axios from 'axios';
 import { Logger } from '../../../utils/logger.js';
-import { PrismaClient } from '../../../../generated/prisma/client.js';
+import { db } from '../../../config/database.js';
+import { products, stores, categories } from '../../../db/schema.js';
+import { eq, and, asc } from 'drizzle-orm';
 ```
 
 ### Naming Conventions
@@ -113,15 +116,19 @@ Logger.debug('Debug');         // Only when DEBUG=true
 
 ### Services Pattern
 
-- Services receive `PrismaClient` via constructor (DI)
+- Services receive `db` (Drizzle instance) via constructor (DI)
 - Use `getOrCreate` for idempotent operations
-- Never call Prisma directly from scrapers
+- Never call Drizzle directly from scrapers
 
 ### Database Patterns
 
-- Upsert via composite unique `(externalId, storeId)`
+- Upsert via composite unique constraint on `(externalId, storeId)`
 - Batch processing: 50 items per batch
-- Prices: Float (rubles), converted from kopecks
+- Prices: Decimal (rubles), stored as decimal type
+- Use `.select().from().where()` for queries
+- Use `.insert().values()` for inserts
+- Use `.update().set().where()` for updates
+- Use `.delete().where()` for deletes
 
 ### Comments