AsyncFast OpenTelemetry instrumentation

[jackburridge]

It should be possible to instrument an AsyncFast application so that it can publish telemetry.

It should follow the semantic conventions https://opentelemetry.io/docs/specs/semconv/messaging/

Hooks may need to be added to support this, the hooks should also be made available to use elsewhere if added

Approaches

There are two main approaches

Hook based

Hooks should be added the the AsyncFast application, and to instrument handlers are added to the hooks, this is similar to what happens with OpenTelemetry FastAPI Instrumentation

Custom Class

A specific trace configuration class is passed into the application, this would be similar to what happens with AIOHTTP Client Tracing

[jackburridge]

@TomKimber I am leaning towards the class based, but I think this requires discussion/PoCs

[jackburridge]

@tomnewport You may have some input