ci: Check if GHAS is enabled.

Author: jamesiarmes

.github/workflows/branch.yaml

@@ -95,6 +95,14 @@ jobs:
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
+      - name: GHAS not enabled warning
+        if: ${{ !github.event.repository.security_and_analysis.advanced_security_enabled && github.event.repository.private }}
+        run: |
+          echo "Warning: GitHub Advanced Security is not enabled. Please enable it to upload SARIF results."
+      - name: GHAS enabled notice
+        if: ${{ github.event.repository.security_and_analysis.advanced_security_enabled || !github.event.repository.private }}
+        run: |
+          echo "GitHub Advanced Security is enabled. SARIF results will be uploaded to the Security tab on the main branch."
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/[email protected]
         with: