Mark an order as no-show

Mark the order as a no-show — used when the customer didn't turn up for a scheduled booking and the operator wants to track the miss for revenue and reporting purposes without going through the standard cancellation flow. The order remains valid (payments stay attached, items aren't released) but is flagged as no_show for reporting.

Fires the internal BasketNoShowed event, which downstream integrations subscribe to for PMS/CRM sync.