Maintain a v7 library safely

Audience: Users keeping local music state healthy. Goal: Maintain the v7 bundle without changing source audio. Type: workflow

1. Scan after adding files. Scan updates Core tracks and tags without writing audio.
2. Keep Core and mandatory *.artifacts.sqlite together. They are bound by catalog_uuid.
3. Treat *.evaluation.sqlite as optional evaluation state.
4. Use relocation preview before apply. Apply changes stored tracks.file_path only; it never moves, copies, deletes, or retags audio.
5. Run Audio Doctor and Audio Dedup in report mode before their confirmation-gated apply modes.

For changed SONARA identity, do not attempt a v5/v6 migration or mix releases. Run the ordered, crash-resumable prepare-sonara-release workflow with backups, then reanalyze and rebuild every SONARA-dependent classifier. It is not a distributed atomic transaction.

Use python scripts\optimize_database.py --db .\data\library.sqlite only for a local bundle you control. It validates and backs up Core + Artifacts before maintenance. The frontend v7 port is deferred, so use CLI/API workflows rather than current browser controls.