[OKAN-SOFTWARE]

Summary

Fixes #7125.

The mbpseudo plugin previously selected the first matching artist alias from the release group and applied it to every track. This produced incorrect translated artist tags on albums containing multiple artists.

Changes

• Resolve artist aliases independently for each track.
• Preserve MusicBrainz artist-credit join phrases.
• Handle recording-level artist credits when track-level credits are missing.
• Fall back to the original artist name when no matching alias exists.
• Reuse the existing MusicBrainz artist-credit parser with an explicit language preference.
• Add regression coverage for albums with multiple artists.

Validation

• Full plugin suite: 1,285 passed, 64 skipped
• Focused MusicBrainz tests: 76 passed
• Mypy type checking: passed
• Ruff lint and formatting: passed
• Git whitespace validation: passed

The regression test reproduced the original issue before the fix and passed afterward.

[github-actions]

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