New report (Reports -> Other, or "Compare" on the Event series page):
each event in a series side by side, oldest first - registrations,
tickets, income (dashboard definition), people checked in (average per
session on multi-session events) and attendance rate, with the change
from the event before. Exports like the other reports; campus-scoped
staff see only their campuses' events. GET /api/series/:id/compare.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>