fix: check report content for broken links instead of exit codes

Timeouts should not cause build failures - only actual broken links (ERROR, 4xx, 5xx)

Author: david-waltermire

.github/workflows/build.yml

@@ -402,10 +402,13 @@ jobs:
           bug
           documentation
     - name: Fail on link check error
-      # Exit codes: 0=success, 1=runtime errors/timeouts, 2=broken links found
-      # Only fail on actual broken links (exit code 2), not timeouts (exit code 1)
-      if: ${{ !inputs.skip_linkcheck && !cancelled() && steps.linkchecker.outputs.exit_code == '2' && env.INPUT_FAIL_ON_ERROR == 'true' }}
-      uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd
-      with:
-        script: |
-          core.setFailed('Link checker detected broken or invalid links, read attached report.')
+      # Check report for actual broken links (ERROR, 4xx, 5xx), not timeouts
+      if: ${{ !inputs.skip_linkcheck && !cancelled() && env.INPUT_FAIL_ON_ERROR == 'true' }}
+      run: |
+        if [ -f "html-link-report.md" ]; then
+          ERRORS=$(grep -cE "^\[ERROR\]|^\[[45][0-9]{2}\]" html-link-report.md 2>/dev/null) || ERRORS=0
+          if [ "$ERRORS" -gt 0 ]; then
+            echo "::error::Link checker found $ERRORS broken link(s). See report for details."
+            exit 1
+          fi
+        fi