Previously, list endpoints returned enriched types (RoastWithRoaster,
BagWithRoast) with related entity names, while get/create/update
endpoints returned bare types without this information.
This change makes all endpoints consistent by returning enriched types:
- Added get_with_roaster and get_with_roast repository methods
- Created define_enriched_get_handler! macro for custom getter methods
- Updated create and update handlers to fetch enriched data after write
- Updated CLI client to expect enriched types
