PR #106 added await to scorecard_tracker calls but the tracker
methods were still sync, causing TypeError in production:
- /scorebug: "object NoneType can't be used in 'await' expression"
- live_scorebug_tracker: "object list can't be used in 'await' expression"
Also fixes 5 missing awaits in cleanup_service.py and updates tests.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>