fix: [CI-5410]: solving NPE in case of cron trigger

Author: devkimittal

332-ci-manager/service/src/main/java/io/harness/ci/execution/integrationstage/IntegrationStageUtils.java

@@ -403,7 +403,7 @@ private static ManualExecutionSource handleManualExecution(
       }
     }
 
-    return null;
+    return ManualExecutionSource.builder().build();
   }
 
   public static List<StepElementConfig> getAllSteps(List<ExecutionWrapperConfig> executionWrapperConfigs) {

332-ci-manager/service/src/main/java/io/harness/ci/execution/states/codebase/ScmGitRefManager.java

@@ -89,7 +89,8 @@ public ScmGitRefTaskResponseData fetchCodebaseMetadata(
           .getLatestCommitResponse(latestCommitResponse.toByteArray())
           .build();
     } else {
-      throw new CIStageExecutionException("Manual codebase git task needs one of PR number, branch or tag");
+      throw new CIStageExecutionException(
+          "Manual codebase git task needs one of PR number, branch or tag. Please check if you are passing codebase inputs correctly.");
     }
   }