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

ts/classes.dcrouter.ts

@@ -254,6 +254,7 @@ export class DcRouter {
 
   // Service lifecycle management
   public serviceManager: plugins.taskbuffer.ServiceManager;
+  private serviceSubjectSubscription?: plugins.smartrx.rxjs.Subscription;
   public smartAcmeReady = false;
 
   // TypedRouter for API endpoints
@@ -516,7 +517,7 @@ export class DcRouter {
     }
 
     // Wire up aggregated events for logging
-    this.serviceManager.serviceSubject.subscribe((event) => {
+    this.serviceSubjectSubscription = this.serviceManager.serviceSubject.subscribe((event) => {
       const level = event.type === 'failed' ? 'error' : event.type === 'retrying' ? 'warn' : 'info';
       logger.log(level as any, `Service '${event.serviceName}': ${event.type}`, {
         state: event.state,
@@ -639,6 +640,13 @@ export class DcRouter {
    */
   private async setupSmartProxy(): Promise<void> {
     logger.log('info', 'Setting up SmartProxy...');
+
+    // Clean up any existing SmartProxy instance (e.g. from a retry)
+    if (this.smartProxy) {
+      this.smartProxy.removeAllListeners();
+      this.smartProxy = undefined;
+    }
+
     let routes: plugins.smartproxy.IRouteConfig[] = [];
     let acmeConfig: plugins.smartproxy.IAcmeOptions | undefined;
     
@@ -1126,6 +1134,12 @@ export class DcRouter {
   public async stop() {
     logger.log('info', 'Stopping DcRouter services...');
 
+    // Unsubscribe from service events before stopping services
+    if (this.serviceSubjectSubscription) {
+      this.serviceSubjectSubscription.unsubscribe();
+      this.serviceSubjectSubscription = undefined;
+    }
+
     // ServiceManager handles reverse-dependency-ordered shutdown
     await this.serviceManager.stop();