Replace overlap Pending flag with PendingRuns counter, match seed stats
by job_id, align average duration with TimedRunCount, and tidy docs.
Co-authored-by: Cursor <cursoragent@cursor.com>
Snapshot store paths under lock before async runs, roll back failed
start/save state, emit UI events only after successful persistence,
surface log write failures, and sync stale YAML docs to JSON.
Co-authored-by: Cursor <cursoragent@cursor.com>
mixeme