feat: Implement person and tag management services

- Added `Person` and `Tag` models to the core library.
- Created `PersonService` and `TagService` traits with implementations for managing persons and tags.
- Introduced repositories for `Person`, `Tag`, `FaceRegion`, and `PersonShare` with PostgreSQL support.
- Updated authorization logic to include permissions for accessing and editing persons.
- Enhanced the schema to support new models and relationships.
- Implemented database migrations for new tables related to persons and tags.
- Added request and response structures for API interactions with persons and tags.

libertas_core/src/services.rs

@@ -3,7 +3,7 @@ use uuid::Uuid;
 
 use crate::{
     error::CoreResult,
-    models::{Album, Media, MediaBundle, User},
+    models::{Album, FaceRegion, Media, MediaBundle, Person, PersonPermission, Tag, User},
     schema::{
         AddMediaToAlbumData, CreateAlbumData, CreateUserData, ListMediaOptions, LoginUserData, ShareAlbumData, UpdateAlbumData, UploadMediaData
     },
@@ -40,3 +40,48 @@ pub trait AlbumService: Send + Sync {
     ) -> CoreResult<Album>;
     async fn delete_album(&self, album_id: Uuid, user_id: Uuid) -> CoreResult<()>;
 }
+
+#[async_trait]
+pub trait TagService: Send + Sync {
+    async fn add_tags_to_media(&self, media_id: Uuid, tag_names: &[String], user_id: Uuid) -> CoreResult<Vec<Tag>>;
+    async fn remove_tags_from_media(&self, media_id: Uuid, tag_names: &[String], user_id: Uuid) -> CoreResult<()>;
+    async fn list_tags_for_media(&self, media_id: Uuid, user_id: Uuid) -> CoreResult<Vec<Tag>>;
+}
+
+#[async_trait]
+pub trait PersonService: Send + Sync {
+    async fn create_person(&self, name: &str, owner_id: Uuid) -> CoreResult<Person>;
+    async fn get_person(&self, person_id: Uuid, user_id: Uuid) -> CoreResult<Person>;
+    async fn list_people(&self, user_id: Uuid) -> CoreResult<Vec<Person>>;
+    async fn update_person(
+        &self,
+        person_id: Uuid,
+        name: &str,
+        user_id: Uuid,
+    ) -> CoreResult<Person>;
+    async fn delete_person(&self, person_id: Uuid, user_id: Uuid) -> CoreResult<()>;
+    
+    async fn assign_face_to_person(
+        &self,
+        face_region_id: Uuid,
+        person_id: Uuid,
+        user_id: Uuid,
+    ) -> CoreResult<FaceRegion>;
+    
+    async fn list_faces_for_media(&self, media_id: Uuid, user_id: Uuid) -> CoreResult<Vec<FaceRegion>>;
+
+    async fn share_person(
+        &self,
+        person_id: Uuid,
+        target_user_id: Uuid,
+        permission: PersonPermission,
+        owner_id: Uuid,
+    ) -> CoreResult<()>;
+
+    async fn unshare_person(
+        &self,
+        person_id: Uuid,
+        target_user_id: Uuid,
+        owner_id: Uuid,
+    ) -> CoreResult<()>;
+}