feat: processed-event ledger, idempotent dispatch

crates/adapters/object-storage/src/lib.rs

@@ -112,6 +112,10 @@ impl ImageCleanupHandler {
 
 #[async_trait]
 impl EventHandler for ImageCleanupHandler {
+    fn name(&self) -> &'static str {
+        "image_cleanup"
+    }
+
     async fn handle(&self, event: &DomainEvent) -> Result<(), DomainError> {
         let poster_path = match event {
             DomainEvent::MovieDeleted { poster_path, .. } => poster_path,