Function parse_position_msg 

pub fn parse_position_msg(
    msg: &BitmexPositionMsg,
    instrument: &InstrumentAny,
    ts_init: UnixNanos,
) -> PositionStatusReport

Parse a BitMEX WebSocket position message into a Nautilus PositionStatusReport.

References

https://www.bitmex.com/app/wsAPI#Position