Get file download URL

import { Agentset } from "agentset";
import fs from 'fs';

const agentset = new Agentset({ apiKey: 'agentset_xxx' });
const ns = agentset.namespace('ns_xxx');

const { url } = await ns.documents.getFileDownloadUrl("doc_123");
const file = await fetch(url);
fs.writeFileSync("file.pdf", Buffer.from(await file.arrayBuffer()));

{
  "success": true,
  "data": {
    "url": "<string>"
  }
}