fix: stabilize tests and sync protocol models

src/agents/pi-embedded-runner.test.ts

@@ -70,7 +70,7 @@ vi.mock("@mariozechner/pi-ai", async () => {
     },
     streamSimple: (model: { api: string; provider: string; id: string }) => {
       const stream = new actual.AssistantMessageEventStream();
-      queueMicrotask(() => {
+      setTimeout(() => {
         stream.push({
           type: "done",
           reason: "stop",
@@ -80,7 +80,7 @@ vi.mock("@mariozechner/pi-ai", async () => {
               : buildAssistantMessage(model),
         });
         stream.end();
-      });
+      }, 0);
       return stream;
     },
   };