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>
Add SeedStats, which reconstructs per-job execution-time aggregates from
existing log files: suffix-matched by sanitized job name, bounded by
MaxLogFiles, and tolerant of duration-less legacy logs (counted in
run/fail totals but excluded from last/avg/max). NewService folds the
seed into each JobRuntime at build time so stats survive a restart.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
mixeme