compactor-scheduler: report queue metrics per lane - #16489

Bugbot Analysis Progress (3m 14s elapsed)

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

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

Request ID: serverGenReqId_4e798f8e-2f00-4584-b2c9-edea4ba08ac6