Add attendee and mark color for progress session events

Your progress session events often miss a backup attendee, making coverage unclear and inviting last-minute changes. Add backup attendees and color-code events so coverage is clear before each session.

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Overview

Stop scrambling for coverage on client days: this flow adds a backup attendee and color-codes progress sessions so your coordinators and coaches see coverage at a glance. That reduces last-minute cancellations and makes coverage visible ahead of each session.