goodman-oai 12b2b58e63 Release the rollout maintenance lock when its guard is dropped (#57247) ...

## Why

A duplicated or inherited file handle can keep the rollout maintenance lock held after its guard is dropped, blocking subsequent compression or migration.

## What changed

Explicitly unlock the file in `RolloutMaintenanceGuard::drop` so lock ownership ends with the guard even if another handle remains open.

## Testing

Add a regression test that retains a duplicated file handle, verifies that the lock stays held until the last shared guard is dropped, and checks that dropping the old handle does not release a newly acquired lock.

GitOrigin-RevId: 19005680dbc0a01b36c6f13e4ec358c6f00b75a0

2026-10-26 20:52:45 +00:00

..

src

Release the rollout maintenance lock when its guard is dropped (#57247)

2026-10-26 20:52:45 +00:00

BUILD.bazel

…

Cargo.toml

Search compressed rollouts concurrently (#55652)

2026-10-20 18:40:33 +00:00