fix: graceful HTTP server shutdown with in-flight request draining - #1210

Bugbot Analysis Progress (2m 28s elapsed)

✅ Gathered PR context (4s)
✅ Completed bug detection (2m 23s)
✅ Posted analysis results (1s)

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

Request ID: serverGenReqId_84ab1713-7fc3-4b49-858f-479d88152926