feat: harden test and registry evidence

tests/mocks/server.ts

@@ -0,0 +1,13 @@
+import { setupServer } from "msw/node";
+
+export function createStrictMockServer(
+  ...handlers: Parameters<typeof setupServer>
+) {
+  const server = setupServer(...handlers);
+  return Object.freeze({
+    server,
+    listen: () => server.listen({ onUnhandledRequest: "error" }),
+    reset: () => server.resetHandlers(),
+    close: () => server.close(),
+  });
+}