Nightly build/test failure - 2026-07-29

## Nightly Failure Report

**Run**: https://github.com/kvcache-ai/Mooncake/actions/runs/30471153615
**Branch**: refs/heads/main
**Timestamp**: 2026-07-29T17:12:34.742Z

Please investigate the failed jobs in the workflow run linked above.

Open the linked GitHub Actions workflow run 30471153615 for the 2026-07-29 main-branch nightly failure and inspect its failed jobs and logs. Start by identifying the failing job and reproduction details; done means the failure cause and required next action are documented or the underlying failure is fixed and the nightly checks pass.

Written by the indexing model from the issue text.