fix: clean up SmartProxy lifecycle

ts/classes/onebox.ts

@@ -435,6 +435,9 @@ export class Onebox {
       // Stop proxy log receiver
       await this.proxyLogReceiver.stop();
 
+      // Stop built-in registry and backing smartstorage server
+      await this.registry.stop();
+
       // Close backup archive
       await this.backupManager.close();