Repair albums that are already duplicated in your library (#5798)

The hourly reconciliation task only looked at albums with an unknown album type, so duplicates that already carry a proper type were never revisited. It now also picks up an album when another library row shares its title and artist, leaving the edition decision to the existing album comparison.

- Reconciliation considers same-title, same-artist sibling rows, not just unknown-typed albums.
- Symbol-only titles ('+', '=', '/') fall back to their raw spelling instead of all matching each other.
- A row already merged away earlier in the run is skipped, while a genuine provider lookup failure is still reported.