chore(ci): make main metadata validation non-blocking

Allow publish runs targeting main to continue when metadata validation reports errors so testing can proceed while still surfacing the validation result in the PR comment.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: rostalan

.github/workflows/auto-publish-pr.yaml

@@ -279,6 +279,7 @@ jobs:
       - prepare
       - check-up-to-date
       - detect-changes
+    continue-on-error: ${{ needs.prepare.outputs.target-branch == 'main' }}
     if: |
       always() &&
       needs.prepare.result == 'success' &&
@@ -371,6 +372,8 @@ jobs:
             const onlyMetadataChanged = core.getInput('only_metadata_changed') === 'true';
             const targetBranch = core.getInput('target_branch');
             const skipMetadataValidationForTesting = targetBranch === 'main';
+            const publishedExports = core.getMultilineInput('published_exports');
+            const failedExports = core.getMultilineInput('failed_exports');
             const checkUpToDateResult = core.getInput('check_up_to_date_result');
             const exportResult = core.getInput('export_result');
             const checkBackstageCompatibilityResult = core.getInput('check_backstage_compatibility_result');
@@ -392,8 +395,10 @@ jobs:
                         (detectResult === 'success' || detectResult === 'skipped');
               publishSuccess = false;
             } else {
-              publishSuccess = exportResult === 'success';
-              success = publishSuccess && checkBackstageCompatibilityResult === 'success';
+              publishSuccess = exportResult === 'success' ||
+                (skipMetadataValidationForTesting && publishedExports.length > 0);
+              success = publishSuccess &&
+                (skipMetadataValidationForTesting || checkBackstageCompatibilityResult === 'success');
             }
 
             await github.rest.repos.createCommitStatus({
@@ -414,8 +419,6 @@ jobs:
             } else {
               body = `[Publish workflow](${workflowRun.data.html_url}) has completed with ${ publishSuccess ? 'success' : 'failure' }.`;
 
-              const publishedExports = core.getMultilineInput('published_exports');
-              const failedExports = core.getMultilineInput('failed_exports');
               if (publishedExports.length + failedExports.length > 0) {
                 if (failedExports.length > 0) {
                   body += '\n\n#### Publishing process\n';
@@ -446,7 +449,11 @@ jobs:
             const metadataValidationErrorsJson = core.getInput('metadata_validation_errors');
 
             if (skipMetadataValidationForTesting) {
-              body += '\n\n#### Metadata Validation\n⚠️ Skipped on `main` for testing.';
+              if (metadataValidationErrorCount && metadataValidationErrorCount !== '0') {
+                body += '\n\n#### Metadata Validation\n⚠️ Validation errors detected on `main`, but they are non-blocking for testing.';
+              } else {
+                body += '\n\n#### Metadata Validation\n⚠️ Skipped on `main` for testing.';
+              }
             } else if (metadataValidationPassed === 'true') {
               body += '\n\n#### Metadata Validation\n✅ All metadata files validated successfully.';
             } else if (metadataValidationErrorCount && metadataValidationErrorCount !== '0') {