Strip non-timestamp characters (BOM, invisible chars) from date/year values
both when reading existing tags in metadata_resolver and when writing in
executor. Also harden the EasyID3 except block to not wipe existing tags
when adding a missing ID3 header, and add per-field try/except in MP3 tag
writing so one bad field doesn't abort the entire track.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
AI-powered per-album pipeline: scan → local hints → MusicBrainz/Discogs/Claude
resolve → cover art → interactive or auto review → tag write + rename + report.
All external dependencies optional; 17/17 unit tests passing.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
