Skip daily summary emails for contact-only events

Contact-only events have no registration flow, so their daily
summary (registration/payment stats) was always empty — exclude
them from the query instead of sending a pointless email.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

backend/src/utils/notifications.js

@@ -1370,14 +1370,14 @@ async function sendDailyEventSummaries(now = new Date()) {
     const today = new Date(now);
     const notifyInclude = { createdBy: { select: { id: true, name: true, email: true } }, notifyRecipients: { select: { id: true, name: true, email: true } } };
     let events = await prisma.event.findMany({
-      where: { isActive: true, startDate: { gte: today } },
+      where: { isActive: true, startDate: { gte: today }, requiresRegistration: true },
       include: notifyInclude,
       orderBy: { startDate: 'asc' },
     });
 
     try {
       events = await prisma.event.findMany({
-        where: { isActive: true, startDate: { gte: today }, goLiveAt: { lte: today } },
+        where: { isActive: true, startDate: { gte: today }, goLiveAt: { lte: today }, requiresRegistration: true },
         include: notifyInclude,
         orderBy: { startDate: 'asc' },
       });