[QUESTION]: msgpack in websockets

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What is your question?

Hi, according to this message:

https://github.com/alpacahq/alpaca-trade-api-csharp/blob/ad8225f3a8e64ce7de43004d6b62b4a2f499acd5/Alpaca.Markets/Parameters/StreamingClientConfiguration.cs#L36

the current WS implementation you're using (which if I'm not wrong it's default .NET ClientWebSocket) doesn't allow to set the Content-Type. I'm trying to use msgpack myself in a websocket accessing alpaca (not through this library though), but it's been impossible.

As writing a full WS implementation for just one parameter is overkill, and asking for a ClientWebSocket fix may literally take years, have you considered requesting an alternative way to switch msgpack on?

Thanks.

### Anything else?

_No response_