Ruslan Nigmatullin 87f3c3284e Track code-mode cell lifecycle and result buffering time (#55653) ...

## What changed

- Add `CodeModeCellTiming` notifications for yielded executions, terminal waits, and unavailable cells, with thread, call, and cell identifiers.
- Measure how long completed results remain buffered before retrieval and carry `result_buffered_for` through the runtime, stdio protocol, and gRPC response metadata. Immediate delivery reports zero; waits without a completed result report no buffering measurement.
- Default missing buffering data to zero for compatibility with older hosts.

## Testing

Extend runtime tests to verify buffering duration with a paused clock and retrieval through termination. Add gRPC conversion tests for nanosecond precision, optional metadata, and the distinction between immediate delivery and no completed result.

GitOrigin-RevId: 60c0c5a3affa69ac3779bf1812fca50f5748af76

2026-10-20 18:53:06 +00:00

..

src

Track code-mode cell lifecycle and result buffering time (#55653)

2026-10-20 18:53:06 +00:00

BUILD.bazel

Code mode on v8 (#15276)

2026-03-20 23:36:58 -07:00

Cargo.toml

Preserve per-session routing for gRPC code mode (#52381)

2026-10-09 02:50:59 +00:00