Review the code changes against the base branch 'main'. The merge base commit for this comparison is 368750cee35f31935640a34ad199e889fc60f1a8. Run `git diff 368750cee35f31935640a34ad199e889fc60f1a8` t

{"findings":[],"overall_correctness":"patch is correct","overall_explanation":"The changes add cleanup on setup failure and make finish stop the measurement goroutine without introducing an observable regression. The updated syncer tests pass, and no actionable issues were found in the diff.","overall_confidence_score":0.88}