- New module musicbrainz.py: lookup_by_barcode() via EAN-13/UPC-12,
two-step API (barcode search → release detail with recordings),
respects 1 req/s rate limit with User-Agent header
- cli.py: scan command gets --barcode option as highest-priority mode
(no images needed); _scan_to_album() dispatches to MusicBrainz first
- ripper.py: interactive_rip() prompts for optional EAN after album name;
MusicBrainz data (incl. year) takes priority over CDDB for album.json;
album_root.mkdir() added so JSON can be written even when MB changes dir
- tests: test_musicbrainz.py (16 tests), test_ripper.py +6 barcode tests
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
