fix(server): remove retired Codex models after refresh - #9773

Bugbot Analysis Progress (3m 15s elapsed)

✅ Gathered PR context (5s)
✅ Completed bug detection (3m 9s)
✅ Posted analysis results (1s)

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

Request ID: serverGenReqId_6b769ea9-bd23-41b2-ad77-2880da781cbe