(request) Decompression middlewares should emit metric for decompression usage

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

I'm trying to find out how often decompression middleware is engaged and it'd be very useful to have a metric that reports how often each of the providers is engaged.

### Describe the solution you'd like

Inbuild metric for decompression middleware that reports how often each provider is engaged.

### Additional context

_No response_