feat: complete TASK-WP0-02 contract baseline

tests/unit/toolchain-smoke.test.ts

@@ -20,7 +20,7 @@ describe("TASK-WP0-01 minimum toolchain", () => {
   });
 
   it("loads and closes Fastify with the frozen Swagger plugin", async () => {
-    const app = createApp();
+    const app = await createApp();
     await app.ready();
     expect(app.hasPlugin("@fastify/swagger")).toBe(true);
     await app.close();