- Created MTGJSONManager service for complete data lifecycle
- Handles download, unpack (gzip/zip), and PostgreSQL upsert
- ON CONFLICT DO UPDATE preserves existing data
- Startup triggers initial download on first container init
- Health check verifies MTG data exists in database
- Weekly refresh via MTG_REFRESH_INTERVAL_DAYS setting
- Updated docker-compose start_period to 600s for download time