Fix imports for Deno

[nfcampos]

Summary

• fix builtin imports for Deno compatibility

Testing

• deno run --node-modules-dir=manual --allow-all --unstable-sloppy-imports /tmp/denotest/run_server.ts

const options = {
  port: 8000,
  nWorkers: 1,
  host: "127.0.0.1",
  cwd: new URL('.', import.meta.url).pathname,
  graphs: { agent: "./agent.mts:graph" },
};

const { host: serverHost } = await startServer(options);

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https://chatgpt.com/codex/tasks/task_e_6847047674f4832dbbb5675a109dadc7