[inspect][codelab] Intentionally hang Reverser response in part 1

TESTED=fx shell run inspect_dart_codelab_client 1 hello

Change-Id: I3fe8d0dfa7df4d542d92c3bb47940b1358ee7ee4
diff --git a/public/dart/fuchsia_inspect/codelab/part_1/lib/src/reverser.dart b/public/dart/fuchsia_inspect/codelab/part_1/lib/src/reverser.dart
index cadc0ad..f8d495b 100644
--- a/public/dart/fuchsia_inspect/codelab/part_1/lib/src/reverser.dart
+++ b/public/dart/fuchsia_inspect/codelab/part_1/lib/src/reverser.dart
@@ -21,6 +21,7 @@
   Future<String> reverse(String value) async {
     // CODELAB: Add stats about incoming requests.
     print(String.fromCharCodes(value.runes.toList().reversed));
+    await Future.delayed(Duration(hours: 10));
     return '';
   }