Move six scripts that are not wired into the app, scheduler, or web UI out of
the active pipeline/lib into pipeline/lib/manual, so the scheduled scripts are
easy to see and these stay available for hands-on use: convert-m4a.sh,
fix-empty-album.sh, backfill-spotify-tags.sh, backfill-buy-url.py,
recover-azuracast-playlists.py, import-dj-collection.py. Adds a README
explaining each, and extends the Dockerfile chmod to cover the new folder.
Nothing referenced these from active code (verified), so no wiring changes.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
andrew