[Feature] Shared Album Photos in Personal Timeline & Memories

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Use case This is similar to other request but i believe unique. Families sharing an Immich instance want a Google Photos-like experience: a shared family album where all members can contribute photos, and those photos appear naturally in each member's personal timeline and memories — without requiring full partner sharing (which shares everything). Current behavior Shared albums support editor roles, so members can upload ✅ However, shared album photos do not appear in the contributor's or viewer's personal timeline ❌ Shared album photos are excluded from Memories, search, and the map view for non-owners ❌ Partner sharing resolves this but shares the entire library — there is no way to share selectively by album ❌ Proposed solution Allow users to opt-in to including a shared album in their personal timeline and Memorie…