refactor: LOW cleanups — dedup secure_flag, remove vestigial social_query,

drop PersistedImportSession, rename LoginQuery→LoginCommand, own
DeleteAccountDeps, PersonId via uuid_id! macro, rename SortDirection→
ReviewSortBy, TUI fs::read→Command, generic PaginatedResponse<T>

crates/application/src/users/deps.rs

@@ -16,3 +16,8 @@ pub struct UpdateProfileDeps {
     pub object_storage: Arc<dyn ObjectStorage>,
     pub event_publisher: Arc<dyn EventPublisher>,
 }
+
+pub struct DeleteAccountDeps {
+    pub user: Arc<dyn UserRepository>,
+    pub event_publisher: Arc<dyn EventPublisher>,
+}