feat: implement media processing plugins and update repository structure

libertas_core/src/repositories.rs

@@ -12,6 +12,13 @@ pub trait MediaRepository: Send + Sync {
     async fn create(&self, media: &Media) -> CoreResult<()>;
     async fn find_by_id(&self, id: Uuid) -> CoreResult<Option<Media>>;
     async fn list_by_user(&self, user_id: Uuid) -> CoreResult<Vec<Media>>;
+    async fn update_metadata(
+        &self,
+        id: Uuid,
+        width: Option<i32>,
+        height: Option<i32>,
+        location: Option<String>,
+    ) -> CoreResult<()>;
 }
 
 #[async_trait]