Implement rotating JSONL recorder for persistent logging (#10428)

* Implement rotating JSONL recorder for persistent logging

* Fixes

* Update documentation and clean up imports in command files

* Address remaining recorder review feedback

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* recorder: fix lock re-entry deadlock on start() and force_rotate_all()

The previous "Fixes" commit added `_files_snapshot()` which acquires
`self._lock` so handlers don't race with `stop()` clearing `_files`.
But two callers were already holding `self._lock` when they invoked
methods that go through the snapshot:

  - `start()` writes the `recorder_start` event from inside its `with
    self._lock:` block. `_write_event` -> `_files_snapshot` re-acquires
    the same non-reentrant `threading.Lock`, freezing process startup.

  - `force_rotate_all()` calls `self.status()` (which also acquires
    `self._lock`) while still holding the lock from rotating each file.

Both fixes release the lock before the call. The recorder_start marker
still lands in events.jsonl because the started/started_at flags are
already set when we write it.

Verified end-to-end against the standalone /tmp/verify_pr_fixes.py
harness — all 9 PR review-comment fixes pass, including pause/resume
event ordering and concurrent start/stop without KeyError.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Fix markdown linting issues in leakhunt.md and repro.md

* Handle recorder startup and query review fixes

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* Tighten recorder follow-up tests

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* Stabilize recorder startup tests

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* Remove brittle recorder startup test

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* Polish recorder follow-up errors

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* Refine recorder startup and regex errors

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* Clean up recorder follow-up nits

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* Trunk

---------

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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mcp-server/.gitignore

@@ -7,6 +7,12 @@ __pycache__/
 dist/
 build/
 
+# Persistent device-log capture (recorder + Datadog cursor).
+# Cross-session JSONL streams written by the autouse Recorder singleton
+# (see src/meshtastic_mcp/recorder/). Lives outside tests/ so the pytest
+# fixture truncate doesn't touch it.
+.mtlog/
+
 # Test harness artifacts
 tests/report.html
 tests/junit.xml