Make all endpoints async

[Kilo59]

To increase the throughput of the API we need to make our routes None blocking.

Methods and dependencies used by the endpoints also need to be non-blocking (where possible).
This is probably the best place to start.

⚠️ Do not simply add async keyword to the current endpoints.

I will update this issue with details.

Resources

https://www.encode.io/articles/hello-asgi
https://fastapi.tiangolo.com/async/#concurrency-and-async-await

[james-gray]

Hey @Kilo59, I've got a branch I can submit for this, but I don't have access rights to push my branch - would it be possible to be added as a collaborator? Thanks!

(CC @ExpDev07 )

[Kilo59]

Anyone can open a pull request
master...james-gray:async-endpoints

[james-gray]

#256

Builds currently failing for 3.6 and 3.7, I wrote this PR under 3.8 - will take a look to see whether there's anything incompatible with the earlier versions.