Notification.timestamp is now stored as a native BSON Date instead of a
string, so load_latest_data must parse the ISO string coming from Redis
back to datetime before building the $gt filter, or the comparison
silently breaks (BSON String vs Date always evaluates False). Also fixes
put_last_data_timestamp, which would otherwise raise TypeError trying to
json.dumps a pandas Timestamp when persisting the new watermark to Redis.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Enhance orchestration configuration and documentation. Added `RUNTIME` variable to `.env.example`, updated `.gitignore` to exclude `openspec/` and `.cursor/`, and modified `README.md` to clarify queue naming conventions and runtime handling. Refactored activities to use synchronous database and email handling, improving performance and consistency. Updated test cases to reflect these changes and ensure compatibility with new activity definitions.
