[Feature] Per-Album Duplicate Detection and Management

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Currently, Immich offers duplicate detection, which appears to operate across the entire library. This is very useful, but it doesn't cover a specific use case related to curated albums. Sometimes, users intentionally include the same photo in multiple different albums (e.g., a photo might be in "Best of Year" and also in "Family Vacation"). The current global duplicate detection might flag these as duplicates needing action, which isn't desired in the context of specific albums. This feature request proposes the ability to detect and manage duplicate photos specifically within the scope of a single album. How it could work: When viewing an album, there could be an option like "Find duplicates in this album". This would scan only the assets currently within that specific album and identify dup…