Update course start records to queue day before reminders

You receive course registrations without scheduled reminders, leaving coordinators unsure who needs a pre-session prompt. It queues day-before reminders and flags the record so coordinators know status.

Workflow preview:

Zap details:

Overview

When course registrations arrive without reminder scheduling, coordinators waste time figuring who needs outreach and messages get missed. This flow computes the day-before send window, queues reminders when appropriate, and flags the record so marketing ops and program coordinators see outreach status the same day.