feat(dataset): stage Pod + tar-over-exec stream (PR-b of #151) - #9

Bugbot Analysis Progress (4m 40s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (4m 32s)
✅ Posted analysis results (5s)

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

Request ID: serverGenReqId_d7dfb02b-77a3-4e4a-b38b-27c47886a868