chore: update codeql-action to v4

Addresses deprecation warning for v3.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/deploy.yaml

@@ -192,7 +192,7 @@ jobs:
           severity: 'CRITICAL,HIGH'
 
       - name: Upload Trivy scan results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@v4
         if: always()
         with:
           sarif_file: 'trivy-results.sarif'