docs(files): define connector credential retirement

tests/test_manifest_documentation.py

@@ -13,6 +13,8 @@ class FilesManifestDocumentationTests(unittest.TestCase):
         self.assertEqual({"user", "admin", "operator"}, set(topic.metadata["perspectives"]))
         self.assertIn("fails closed", topic.body)
         self.assertIn("DFS referrals", topic.body)
+        self.assertIn("immediately scrubs", topic.body)
+        self.assertTrue(any("non-owned external references" in item for item in topic.metadata["security_invariants"]))
         self.assertIn("revision", topic.metadata["provenance_fields"])
         self.assertIn("/api/v1/files/connectors/profiles", {link.href for link in topic.links})