debug: add CI debug step to capture cmd/service --help failure output

The unit tests for cmd and service scripts --help fail on CI (amd64)
but pass locally (arm64). Adding a debug step to capture the actual
error output when the test fails.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: terchris

.github/workflows/ci-tests.yml

@@ -191,6 +191,22 @@ jobs:
             devcontainer-test:latest \
             bash /workspace/.devcontainer/additions/tests/run-all-tests.sh unit
 
+      - name: Debug failing scripts (if unit tests failed)
+        if: failure()
+        run: |
+          echo "=== Debug: cmd-ai.sh --help ==="
+          docker run --rm \
+            -v "${{ github.workspace }}:/workspace" \
+            -w /workspace \
+            devcontainer-test:latest \
+            bash -c 'bash /workspace/.devcontainer/additions/cmd-ai.sh --help 2>&1; echo "EXIT=$?"'
+          echo "=== Debug: service-nginx.sh --help ==="
+          docker run --rm \
+            -v "${{ github.workspace }}:/workspace" \
+            -w /workspace \
+            devcontainer-test:latest \
+            bash -c 'bash /workspace/.devcontainer/additions/service-nginx.sh --help 2>&1; echo "EXIT=$?"'
+
   # ===========================================================================
   # Summary Job
   # ===========================================================================