Bug fixes

• Bad Files Plugin: Fix number of found errors in log message
• MusicBrainz Plugin: Fix crash when release mediums lack the tracks key. 🐛 (#6302)
• MusicBrainz Plugin: Fix fetching very large releases that have more than 500 tracks. 🐛 (#6355)
• MusicBrainz Plugin: Fix search terms escaping. 🐛 (#6347)
• MusicBrainz Plugin: Fix support for alias and tracks extra_tags.
• MusicBrainz Pseudo-Release Plugin: Fix crash due to missing artist_credit field in the MusicBrainz API response. 🐛 (#6339)
• ReplayGain Plugin: Avoid magic Windows prefix in calls to command backends, such as mp3gain. 🐛 (#2946)

Other changes

• Lyrics Plugin: Disable tekstowo by default because it blocks the beets User-Agent.