Add purpose-bound form evidence storage

tests/test_manifest_documentation.py

@@ -15,6 +15,7 @@ STATIC_TOPIC_IDS = {
     "files.reference.generated-artifact-store",
     "files.reference.snapshot-provenance-and-capabilities",
     "files.records.exact-version-source",
+    "files.forms-runtime.managed-evidence",
     "files.assurance.process-and-release-readiness",
 }
 RUNTIME_TOPIC_IDS = {
@@ -170,7 +171,9 @@ class FilesManifestDocumentationTests(unittest.TestCase):
         self.assertIn("bounded resumable integrity scan", topic.body)
         self.assertIn("quarantined", topic.body)
         self.assertIn("MASTER_KEY_B64", topic.metadata["recovery_unit"])
-        self.assertIn("Encryption envelope and wrapped-key rows", topic.metadata["recovery_unit"])
+        self.assertIn(
+            "Encryption envelope and wrapped-key rows", topic.metadata["recovery_unit"]
+        )
         self.assertIn("lease-fenced Core recovery", topic.body)
         self.assertIn("Ops", topic.body)
         self.assertTrue(topic.metadata["verification"])
@@ -196,7 +199,11 @@ class FilesManifestDocumentationTests(unittest.TestCase):
         self.assertEqual(("admin", "user"), topic.documentation_types)
         self.assertEqual("reference", topic.metadata["kind"])
         self.assertEqual(
-            ["files.access@0.1.6", "files.campaign_attachments@0.1.6"],
+            [
+                "files.access@0.1.6",
+                "files.campaign_attachments@0.1.6",
+                "forms_runtime.evidence.files@1.0.0",
+            ],
             topic.metadata["provided_interfaces"],
         )
         self.assertIn("revision", topic.metadata["provenance_fields"])