test: add reproducer for quant engine lite gate

tests/governance/test_ci_contract.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+import re
+import unittest
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+class CiContractTests(unittest.TestCase):
+    def test_ci_is_one_dependency_free_lite_gate(self) -> None:
+        workflow = (ROOT / ".gitea/workflows/ci.yml").read_text(encoding="utf-8")
+        jobs = workflow.split("jobs:", 1)[1]
+        self.assertEqual(re.findall(r"(?m)^  ([a-z][a-z0-9_-]*):\s*$", jobs), ["lite"])
+        self.assertIn("actions/checkout@524e936cd9e579adf00e308bfdf971aebc7de09e", workflow)
+        self.assertIn("persist-credentials: false", workflow)
+        self.assertIn("python3 tests/governance/test_module_spec.py", workflow)
+        for forbidden in ("setup-python", "pip ", "curl ", "wget ", "docker pull"):
+            self.assertNotIn(forbidden, workflow)
+
+
+if __name__ == "__main__":
+    unittest.main()