- Convert MarketplaceService methods to async (list_offers, get_offer, create_offer, list_bids, create_bid)
- Add await to all database operations (execute, commit, refresh)
- Change Session to AsyncSession in MarketplaceService constructor
- Add try-except blocks with detailed logging to all service methods
- Add logging for method entry, database queries, result counts, and errors
- Add try-except with logging to get_session generator
- Simpl
