refactor: remaining MEDIUM — CQRS splits, DI Deps, profile dedup, event Value, response enum

M1: MovieRepository→MovieCommand/MovieQuery, WatchEventRepository→
WatchEventCommand/WatchEventQuery
M2: goals/ and import/ use Deps structs
M7: extract upload_image helper in update_profile
M8: FederationDeliveryRequested activity_json String→serde_json::Value
M11: UserProfileResponse uses ProfileViewData enum

crates/application/src/watchlist/add.rs

@@ -15,7 +15,8 @@ pub async fn execute(
 
     let (movie, _is_new) = resolve_and_persist_movie(
         &cmd.input,
-        deps.movie.as_ref(),
+        deps.movie_command.as_ref(),
+        deps.movie_query.as_ref(),
         deps.metadata.as_ref(),
         deps.event_publisher.as_ref(),
     )

crates/application/src/watchlist/deps.rs

@@ -1,9 +1,10 @@
 use std::sync::Arc;
 
-use domain::ports::{EventPublisher, MetadataClient, MovieRepository, WatchlistRepository};
+use domain::ports::{EventPublisher, MetadataClient, MovieCommand, MovieQuery, WatchlistRepository};
 
 pub struct WatchlistAddDeps {
-    pub movie: Arc<dyn MovieRepository>,
+    pub movie_command: Arc<dyn MovieCommand>,
+    pub movie_query: Arc<dyn MovieQuery>,
     pub metadata: Arc<dyn MetadataClient>,
     pub watchlist: Arc<dyn WatchlistRepository>,
     pub event_publisher: Arc<dyn EventPublisher>,

crates/application/src/watchlist/tests/add.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 
 use domain::{
     models::Movie,
-    ports::MovieRepository,
+    ports::MovieCommand,
     testing::{InMemoryMovieRepository, InMemoryWatchlistRepository, NoopEventPublisher},
     value_objects::{MovieTitle, ReleaseYear},
 };
@@ -17,7 +17,8 @@ fn make_deps(
     watchlist: Arc<InMemoryWatchlistRepository>,
 ) -> WatchlistAddDeps {
     WatchlistAddDeps {
-        movie: movies,
+        movie_command: Arc::clone(&movies) as _,
+        movie_query: movies,
         metadata: Arc::new(domain::testing::FakeMetadataClient),
         watchlist,
         event_publisher: NoopEventPublisher::new(),