- Remove x-grpc-upstream metadata from gateway forwarding; use SetUpstream
- Remove YAO_GRPC_TAI / YAO_GRPC_UPSTREAM env vars from sandbox containers
- Delete benchmark-sandbox-v2 CI job (run benchmarks locally)
- Simplify sandbox-v2 CI to tai SDK + workspace tests only
- Add HostExec support to sandbox v2 box interface
- Add K8s semaphore and cleanup mutex for test stability
- Update design docs to reflect new architecture
Made-with: Cursor