Deribit updates

[goodboy]

Various updates since deribit was last authored / tested 😂 :

• add deribit to our default backend scan list in piker.brokers.__brokers__: list[str]
• fixes for new msgspec version namely ensuring default spec-ced fields are placed after fields with non-defaults.
• API tweak to match new kwarg name in open_jsonrpc_session(): dtype -> response_type=JSONRPCResult
• fix the Callable yielded from open_history_client() to accept the timeframe: float arg now required for multi-sample rate queries.

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ToDo for this to land

• [x] support and/or fix 1s OHLC chart sampling
  • [x] tread step size is borked when overlayed with btcusdt.binance? think it's fixed now after adjusting the history loader in bullet below?
  • [x] adjust the open_history_client() routine(s) to appropriately block on 1s history queries fixed in 47a4da9
• [x] do a once over lint with at least flake8

[goodboy]

I'm going to do a bit more linting and testing of this code to see if we can get it up to snuff with the latest paper trading stuff in #462 as well 🏄🏼

[goodboy]

@guilledk where we at on this one carnal?

I kinda wanna play with some opts feeds this weekend 🏄🏼