Function parse_spot_instrument 

pub fn parse_spot_instrument(
    symbol: &BinanceSpotSymbol,
    ts_event: UnixNanos,
    ts_init: UnixNanos,
) -> Result<InstrumentAny>

Parses a Binance Spot symbol definition into a Nautilus CurrencyPair instrument.

Errors

Returns an error if:

• Required filter values are missing (PRICE_FILTER, LOT_SIZE).
• Price or quantity values cannot be parsed.
• The symbol is not actively trading.