fix(lifecycle): clean up service subscriptions, proxy retries, and stale runtime state on shutdown

ts/index.ts

@@ -35,6 +35,6 @@ export const runCli = async () => {
     await dcRouter.stop();
     process.exit(0);
   };
-  process.on('SIGINT', shutdown);
-  process.on('SIGTERM', shutdown);
+  process.once('SIGINT', shutdown);
+  process.once('SIGTERM', shutdown);
 };