- _parse_cddb_lines now handles both 'Artist - Title' and 'Artist / Title'
(slash separator used by abcde for compilation albums like Various Artists)
- _stream_abcde collects grab-progress lines (track N: Artist / Title)
as a fallback TrackInfo source when no CDDB lines are found
- New _parse_grab_tracks() splits grab titles on ' / ' into artist+title
- 5 new tests (TestParseCddbLines.test_compilation_slash_separator,
TestParseGrabTracks.*)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>