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/import/mod.rs

@@ -4,6 +4,7 @@ pub mod cleanup;
 pub mod commands;
 pub mod create_session;
 pub mod delete_profile;
+pub mod deps;
 pub mod execute;
 pub mod list_profiles;
 pub mod save_profile;