New: add Python script syntax validation to CI

.github/workflows/ci.yml

@@ -48,3 +48,20 @@ jobs:
     - name: yaml schema check
       run: |
         bash ./scripts/validate-python.sh
+  python_syntax:
+    name: Validate Python Script Syntax
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v5
+    - name: Setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Check Python syntax
+      run: |
+        python3 -m py_compile scripts/validate.py
+        echo "Python script syntax validation passed"
+    - name: Run basic Python tests
+      run: |
+        python3 -c "import ast; ast.parse(open('scripts/validate.py').read()); print('AST parsing successful')"
+        python3 scripts/validate.py --version