[Benchmark A/A] Daily stability test failed – 2026-06-01

[github-actions]

Daily A/A Benchmark Failure

The scheduled A/A benchmark run (main vs main) failed on 2026-06-01.
This indicates environment noise exceeded the configured thresholds.

Run: https://github.com/microsoft/DiskANN/actions/runs/26750296444
Recent failure rate: 3/20 (15.0%) — exceeds 5% reliability budget

Please review the benchmark artifacts and determine if thresholds need tuning
or if there is a runner environment issue.

/cc @microsoft/diskann-disk-maintainers