Using the Bluesky API from Cloudflare workers doesn't work due to IP rate limits

[treeder]

Describe the bug

Cloudflare workers across all customers use the same IP ranges so when I run my code on Cloudflare, I get the RateLimitExceeded error every time I call createSession.

Cloudflare IP ranges: https://www.cloudflare.com/ips/

To Reproduce

Run this on a Cloudflare worker or pages site:

let host = 'https://bsky.social/xrpc'
let r = await fetch(`${host}/com.atproto.server.createSession`, {
    method: 'POST',
    body: {
      identifier: `${this.opts.username}`,
      password: this.opts.password,
    }
  })

Expected behavior

Not to get rate limited. This makes using Bluesky impossible if you're using Cloudflare infrastructure.

Perhaps if we're performing authentication or using a JWT in subsequent calls, the rate limiting should apply to those credentials rather than IP addresses.

And/or do not apply those rate limits to the Cloudflare IP ranges.