- Modify sql_select to return False on database exceptions instead of an empty result
- Update V3 Search endpoint to catch False results and return a 500 Internal Server Error
- Enhances error visibility for frontend developers and prevents misleading 200 OK responses during SQL errors
- Refactor SQL CRUD to use engine.connect() context managers for thread safety
- Optimize connection pooling in lib_sql_core
- Clean up app/routers/api.py to fix duplicate definitions and OpenAPI KeyError
- Add 'default_qry_str' to searchable_fields for Event, Session, Presentation, Presenter, Badge, and Journal
- Add 'event_location_name' to searchable_fields for Event Session
- Verified 20/20 E2E success via repro_intermittent_errors.py
- Update sql_connect to refresh global db object via reconnect_db
- Add returns_rows check and safe fetch block in sql_select
- Prevents 500 errors during transient database connection issues
