Feature request: named sub-requests

[shaunpersad]

Currently, all sub-requests show up in the Honeycomb dash as fetch. It would be great to add an hc Honeycomb param to the fetch options, similar to the cf Cloudflare param. In it, we could specify the service name and perhaps any other initial span data for the sub-request.

e.g.:

await request.tracer.fetch('https://storage.googleapis.com', {
  method: 'POST',
  body: 'foo',
  hc: {
    serviceName: 'gcp-storage',
  },
})

[evanderkoogh]

This is a great suggestion! I am going to try and see what I can throw together over the weekend :)