zebra 92742b9ad6 perf: parallelize --repair with a thread pool (--workers, default 8) ...

Each repaired file is an independent yt-dlp metadata round-trip, so repair is
network-bound; run them concurrently via ThreadPoolExecutor. Adds --workers
(default 8) to cap concurrency and a progress line every 100 files. At ~50k
tracks this turns a ~day-long sequential run into hours. Lower --workers if
YouTube rate-limits (429/403).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-13 11:13:52 -07:00

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