refactor(watchlist): WatchlistAddDeps, scoped Arc deps

crates/application/src/watchlist/deps.rs

@@ -0,0 +1,10 @@
+use std::sync::Arc;
+
+use domain::ports::{EventPublisher, MetadataClient, MovieRepository, WatchlistRepository};
+
+pub struct WatchlistAddDeps {
+    pub movie: Arc<dyn MovieRepository>,
+    pub metadata: Arc<dyn MetadataClient>,
+    pub watchlist: Arc<dyn WatchlistRepository>,
+    pub event_publisher: Arc<dyn EventPublisher>,
+}