feat: Add thumbnail management for albums and people, implement face embedding functionality

libertas_api/src/services/person_service.rs

@@ -215,4 +215,34 @@ impl PersonService for PersonServiceImpl {
 
         self.person_repo.delete(source_person_id).await
     }
+
+    async fn set_person_thumbnail(
+        &self,
+        person_id: Uuid,
+        face_region_id: Uuid,
+        user_id: Uuid,
+    ) -> CoreResult<()> {
+        self.auth_service
+            .check_permission(Some(user_id), authz::Permission::EditPerson(person_id))
+            .await?;
+
+        let face_region =
+            self.face_repo
+                .find_by_id(face_region_id)
+                .await?
+                .ok_or(CoreError::NotFound(
+                    "FaceRegion".to_string(),
+                    face_region_id,
+                ))?;
+
+        if face_region.person_id != Some(person_id) {
+            return Err(CoreError::Validation(
+                "FaceRegion does not belong to the specified person".to_string(),
+            ));
+        }
+
+        self.person_repo
+            .set_thumbnail_media_id(person_id, face_region.media_id)
+            .await
+    }
 }