[QUERY] How to use files.upload to upload a binary file

Question

How does one use files.upload? I tried

import { Readable } from "node:stream";

// ...

      // This is a `ReadableStream<Uint8Array>`...
      const audio = (await fetch("https://upload.wikimedia.org/wikipedia/commons/7/71/George_Gershwin_2.ogg")).body!;

      const response = await client.files.upload({
        channels: "<channel ID>",
        title: "Title",
        initial_comment: "Comment",
        // ...which I adapt into a Node.js `Readable` here
        file: Readable.from(audio),
        filename: "audio.ogg",
        filetype: "ogg",
      });

With this code, the API response is {"ok":false,"error":"no_file_data"}. I was expecting this to work since the files.upload JavaScript sample code, whose docs do similar, refer to something like the above as the legacy way to upload files. My use case is simple so I think I'm ok with a legacy way, as long as it works. Thanks!

Context

Environment

"deno-slack-sdk/": "https://deno.land/x/deno_slack_sdk@2.5.0/",
"deno-slack-api/": "https://deno.land/x/deno_slack_api@2.1.2/",

deno 1.40.5 (release, aarch64-apple-darwin)
v8 12.1.285.27
typescript 5.3.3

ProductName: macOS
ProductVersion: 14.2.1
BuildVersion: 23C71
Darwin Kernel Version 23.2.0: Wed Nov 15 21:53:18 PST 2023; root:xnu-10002.61.3~2/RELEASE_ARM64_T6000

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

Start with the files.upload call and the linked Slack files.upload documentation and JavaScript sample. Compare those references with the deno-slack-api@2.1.2 and deno-slack-sdk@2.5.0 environment shown here; done means documenting a verified binary-upload example or clarifying the supported input.