notify router: read custom flows and disabled built-ins from a stored document

swarm-controller/src/startup.rs

@@ -635,6 +635,7 @@ pub(crate) fn build_app(state: AppState) -> axum::Router {
             review_classifier::settings::get_settings,
             review_classifier::settings::put_settings
         ))
+        .routes(routes!(notify_flows::get_flows, notify_flows::put_flows))
         .routes(routes!(webhook::post_webhook_forge))
         .split_for_parts();
     // Just the JSON, not the UI — Swagger UI itself is nginx-hosted from