[Feature] Add "Date Taken (oldest first)" as a criterion for automatic duplicate preselection

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature When using "Deduplicate All", Immich automatically selects which asset to keep based on two criteria only: larger file size and more EXIF metadata. However, preserving the oldest / earliest-taken photo can be more important in many scenarios. A smaller original photo taken earlier often has more sentimental value than a later re-compressed copy that happens to be larger. Users migrating from Google Photos or iCloud commonly face this — the original upload is the one they want to keep, not the re-encoded duplicate. Describe the solution you'd like Add a third criterion to the automatic preselection logic: "Date Taken" (DateTimeOriginal / file created date) — earlier is preferred. At minimum, date should act as a tiebreaker when file sizes and EXIF counts are comparable. Ideally, allow the user t…