async

First check

• I added a very descriptive title to this issue.
• I used the GitHub search to find a similar issue and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answ

🐞 Describe the bug

TraceConfig.on_response_chunk_received doesn't trace if the response body is read from ClientResponse.content

This behavior isn't obvious when looking at Tracing Reference, [Streaming Response Content](https://docs.aiohttp.org/e

Is your feature request related to a problem? Please describe.
It's not a problem but would be an improvement to avoid misunderstandings

Describe the solution you'd like
I wanted to remap the stage_item/unstage_item to Spacebar instead of Enter, so I changed

enter: ( code: Enter, modifiers: ( bits: 0,),),    

to

enter: ( code: Char(' '), modifiers: ( bits: 0,),)

Could you please make AnyKind derive Copy and Clone ?
That'd help me a lot. Now I need to create another enum and cannot use AnyKind directly.

Stitching API

Opencv provide a Stitching module/API

Bascially, i would like to be able to rewrite stitching_detailed.cpp in javascript

This includes :

• Stitcher class
• Features extractors (already implemented in opencv4nodejs)
• Estimator

What should happen if deliver_cancel raises an exception? In the current implementation, the shielded cancel scope will prevent it from propagating until the process exits, which might take a while if the crash occurred before signaling the process in any way. Maybe on exception from a user-specified deliver_cancel we should call the default deliver_cancel to kill the process? Or just kill() since