domain: add Organization entities and ports (Album, Tag, Collection, FilterCriteria)

crates/domain/src/entities/mod.rs

@@ -25,3 +25,11 @@ pub use asset_metadata::{AssetMetadata, MetadataSource};
 pub use asset_stack::{AssetStack, AssetStackMember, StackMemberRole, StackType};
 pub use derivative_asset::{DerivativeAsset, DerivativeProfile, GenerationStatus};
 pub use duplicate::{DetectionMethod, DuplicateCandidate, DuplicateGroup, DuplicateStatus};
+
+mod album;
+mod tag;
+mod collection;
+
+pub use album::{Album, AlbumEntry};
+pub use tag::{AssetTag, Tag, TagSource};
+pub use collection::Collection;