feat: NATS 连接与 JetStream 流引导（BPOS_EVT/CMD/DLQ）＋touch 发布

src/app/app.ts

@@ -1,7 +1,9 @@
 import { Hono } from 'hono';
-import { healthRoute } from './health';
+import { healthRoute, registerHealthCheck } from './health';
+import { checkNats } from '../shared/bus/nats';
 
 export function buildApp(): Hono {
+  registerHealthCheck('nats', checkNats);
   const app = new Hono();
   app.route('/health', healthRoute());
   return app;