会话锁释放补强，修复 .lock 长期占用导致模型调用卡死（PR #15021）

• You can access OpenClaw host filesystem and inspect lock file paths.
• Current deployment has observed lock-timeout errors or stale .lock files.
• A maintenance window is available for restart and stress replay.

1. Collect baseline logs for session file locked errors and count existing lock files.
2. Upgrade to a build that includes PR #15021 and restart gateway.
3. Replay concurrent workloads (or synthetic burst requests) for 10-15 minutes.
4. Observe lock lifecycle: creation during write, cleanup after completion, and no persistent orphan files.
5. If residual timeouts remain, isolate storage latency or plugin dispose errors as secondary root causes.

• The patch reduces lock leaks, but overloaded disks or abrupt process kills can still cause transient contention.
• Manual lock-file deletion on active systems is risky; perform only in controlled maintenance windows（需验证）。

This tip is aggregated from community/public sources and preserved with attribution.