fix: harden invalidation registry governance

tests/unit/http-execution-v3.test.ts

@@ -2,15 +2,13 @@ import { describe, expect, it, vi } from "vitest";
 
 import { createContractHttpExecutor } from "../../src/adapters/http/http-execution-v3.ts";
 import type { InstalledHttpContract } from "../../src/contracts/external-contract-runtime.ts";
-import { COMPOSED_CONTRACT_CONTRIBUTIONS } from "../../src/features/installed-contract-contributions.ts";
+import {
+  TEST_CREATE_HTTP_CONTRACT,
+  TEST_LIST_HTTP_CONTRACT,
+} from "../helpers/external-contract-fixture.ts";
 
-const installed = (() => {
-  const candidate = COMPOSED_CONTRACT_CONTRIBUTIONS.httpByOperationId.get(
-    "LIST_REFERENCE_RESOURCES",
-  );
-  if (!candidate) throw new Error("reference list contract is not installed");
-  return candidate;
-})();
+const installed: InstalledHttpContract<unknown, unknown, unknown> =
+  TEST_LIST_HTTP_CONTRACT;
 
 const scope = Object.freeze({
   generation: 1,
@@ -20,13 +18,8 @@ const scope = Object.freeze({
   isCurrent: () => true,
 });
 
-const createInstalled = (() => {
-  const candidate = COMPOSED_CONTRACT_CONTRIBUTIONS.httpByOperationId.get(
-    "CREATE_REFERENCE_RESOURCE",
-  );
-  if (!candidate) throw new Error("reference create contract is not installed");
-  return candidate;
-})();
+const createInstalled: InstalledHttpContract<unknown, unknown, unknown> =
+  TEST_CREATE_HTTP_CONTRACT;
 
 function operation(
   overrides: Readonly<{