Function dispatch_trades_payload 

pub fn dispatch_trades_payload(
    data: DeriveTradesSubscriptionData,
    emitter: &ExecutionEventEmitter,
    account_id: AccountId,
    clock: &'static AtomicTime,
    dispatch_state: &WsDispatchState,
)

Dispatches a parsed {subaccount_id}.trades payload to the execution event emitter.

Deduplicates by trade id, then emits a tracked fill when the trade’s client order id resolves to a registered identity in dispatch_state, and forwards a raw fill report otherwise.