Add report fragments and export manifest

extensions/sdk-fixture/extension.json

@@ -74,7 +74,17 @@
   "mappings": [
     "sdk-fixture-map"
   ],
-  "report_fragments": [],
+  "report_fragments": [
+    {
+      "id": "sdk-fixture-summary",
+      "kind": "python_module",
+      "module_path": "reports/sdk_fixture_summary.py",
+      "callable": "build_fragment",
+      "path": null,
+      "title": "SDK Fixture Summary",
+      "description": "Summarizes SDK fixture evidence for report fragment tests."
+    }
+  ],
   "dependencies": [],
   "restricted_assets": [],
   "certification_boundary": "SDK fixture only. It does not certify any product, process, or repository."