test(cli): bind service conflict fixture to IPv4

Author: kitlangton

packages/cli/test/service.test.ts

@@ -302,7 +302,7 @@ test("configured managed service port overrides the channel default", async () =
 
 test("unrelated managed port occupancy reports an actionable conflict", async () => {
   const root = await fs.mkdtemp(path.join(os.tmpdir(), "opencode-service-conflict-"))
-  const listener = Bun.serve({ port: 0, fetch: () => new Response("unrelated") })
+  const listener = Bun.serve({ hostname: "127.0.0.1", port: 0, fetch: () => new Response("unrelated") })
   const port = listener.port
   const registration = path.join(root, "state", "opencode", "service-local.json")
   await fs.mkdir(path.join(root, "config", "opencode"), { recursive: true })