Merge pull request #16519 from [BEAM-13639] [Playground] Add notifica…

…tion to Log/Output tabs about cached example

* [BEAM-13639] Added log about cached results for precompiled examples

* [BEAM-13639] Fixed _getPipelineResult method of code_repository

playground/frontend/lib/pages/playground/states/playground_state.dart

@@ -34,6 +34,8 @@ const kTitle = 'Catalog';
 const kExecutionCancelledText = '\nPipeline cancelled';
 const kPipelineOptionsParseError =
     'Failed to parse pipeline options, please check the format (example: --key1 value1 --key2 value2), only alphanumeric and ",*,/,-,:,;,\',. symbols are allowed';
+const kCachedResultsLog =
+    'The results of this example are taken from the Apache Beam Playground cache.\n';
 
 class PlaygroundState with ChangeNotifier {
   late SDK _sdk;
@@ -180,10 +182,11 @@ class PlaygroundState with ChangeNotifier {
     notifyListeners();
     // add a little delay to improve user experience
     await Future.delayed(kPrecompiledDelay);
+    String logs = _selectedExample!.logs ?? '';
     _result = RunCodeResult(
       status: RunCodeStatus.finished,
       output: _selectedExample!.outputs,
-      log: _selectedExample!.logs,
+      log: kCachedResultsLog + logs,
     );
     _executionTime?.close();
     notifyListeners();