Function parse_order_canceled 

pub fn parse_order_canceled(
    msg: &DeribitOrderMsg,
    instrument: &InstrumentAny,
    account_id: AccountId,
    trader_id: TraderId,
    strategy_id: StrategyId,
    ts_init: UnixNanos,
) -> OrderCanceled

Parses a Deribit order message into an OrderCanceled event.

This should be called when an order transitions to “cancelled” state.