Replace provider session reaper polling with deadline-driven scheduling - #2351

Bugbot Analysis Progress (8m 25s elapsed)

✅ Gathered PR context (2s)
✅ Completed bug detection (8m 22s)
✅ Posted analysis results (1s)

Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_28bed6cf-cda1-4aaa-9750-051dd9d9d8a4