Keep on-duty captain reflected in IT usergroup membership

IT admins miss role mentions and wrong permissions when captain events don't update usergroups, causing missed escalations. This keeps the assigned captain in the usergroup so mentions and access go to the current captain.

Overview

Missed captain mentions create escalation gaps and frustrate responders. Connecting calendar start events to usergroup membership ensures the assigned captain receives mentions and correct access, eliminating missed handoffs and making on-call coverage reliable.

Notable Features

Add assigned captain to usergroup
Trigger on captain calendar event start
Notify support channels of change