feat(db): add rent_payment_destinations column and multi-schema support

- Add migration 0020 for rent_payment_destinations jsonb column
- Add DB_SCHEMA env var support for multi-schema deployments
- Create custom migrate.ts script with proper search_path handling
- Update drizzle.config.ts and client.ts to use DB_SCHEMA
- Add db_schema variable to Terraform with dev=test/prod=public defaults
- Update CD workflow to set DB_SCHEMA based on branch

.env.example

@@ -5,6 +5,7 @@ PORT=3000
 
 # Database
 DATABASE_URL=postgres://postgres:postgres@127.0.0.1:54322/postgres
+DB_SCHEMA=public
 
 # Telegram
 TELEGRAM_BOT_TOKEN=your-telegram-bot-token