feat: ConfigSource enum, RwLock provider_registry, is_admin in UserResponse, available_provider_types

k-tv-backend/api/src/routes/auth/local.rs

@@ -86,6 +86,7 @@ pub(super) async fn me(CurrentUser(user): CurrentUser) -> Result<impl IntoRespon
         id: user.id,
         email: user.email.into_inner(),
         created_at: user.created_at,
+        is_admin: user.is_admin,
     }))
 }