Update canceled reservation across calendar, payment and sheets

Canceled reservation rows leave events, payments, and inventory out of date and need manual fixes. It removes the calendar event and updates payments and inventory so records align same day.

Overview

Cancellations that only live in spreadsheets cause scheduling, billing, and inventory to drift and demand manual reconciliation. This flow removes the matching calendar event and updates payment and inventory rows so operations has aligned records within minutes and avoids end-of-day cleanup.