jif d5e6526362 Scan the session index backwards for batch thread name lookups (#49297) ...

## Why

Batch thread name lookups read the entire append-only session index even when all requested names could be found near the end.

## What changed

Use `ReverseJsonlScanner` in `spawn_blocking` for `find_thread_names_by_ids`, stopping once every requested ID has a usable name. Preserve the latest nonempty, trimmed name for each ID while skipping malformed entries.

## Testing

Add regression coverage for renamed threads, whitespace-only names, Unicode, reads across chunk boundaries, malformed entries, a partial final write, and missing IDs.

GitOrigin-RevId: 2ab9254ba8b718fe3e02c47fc9b0de20c09fd10f

2026-09-29 16:16:39 +00:00

..

src

Scan the session index backwards for batch thread name lookups (#49297)

2026-09-29 16:16:39 +00:00

BUILD.bazel

…

Cargo.toml

Suppress Windows console windows for background subprocesses (#49164)

2026-09-29 04:38:37 +00:00