fix：热更新对比补充

lib/app/bootstrap.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io' show Platform;
 
 import 'package:flutter/foundation.dart' show kIsWeb;
@@ -29,8 +30,9 @@ Future<Widget> bootstrap() async {
     }
   }
   if (!kIsWeb) {
-    await ShorebirdService.instance.initCurrentPatch();
-    ShorebirdService.instance.checkForUpdateInBackground();
+    // Shorebird's native updater performs the automatic launch-time update.
+    // Reading the running patch is diagnostic state and must not delay startup.
+    unawaited(ShorebirdService.instance.initCurrentPatch());
   }
   return const JinzhiApp();
 }