Migrate Policy retention interfaces

tests/test_policy_module_contract.py

@@ -58,6 +58,20 @@ class PolicyModuleContractTests(unittest.TestCase):
             set(manifest.capability_factories),
         )
 
+    def test_retention_documentation_exposes_stable_help_contexts(self) -> None:
+        topic = next(
+            item
+            for item in manifest.documentation
+            if item.id == "policy.hierarchy-overrides-and-retention"
+        )
+
+        self.assertEqual(
+            ["policy.retention", "privacy.retention"],
+            topic.metadata["help_contexts"],
+        )
+        self.assertEqual("workflow", topic.metadata["kind"])
+        self.assertIn("/admin", topic.metadata["route"])
+
 
 if __name__ == "__main__":
     unittest.main()