fix: only count attended events in profile statistics

- Update getUserProfile to count only eventRegistrations where attended=true
- This ensures 'Events Attended' shows actual attended events, not just registrations
- Impact score calculation already had this logic and remains unchanged

Now 'Events Attended' will only increment after an event is completed and marked as attended

server/src/services/userService.ts

@@ -85,7 +85,9 @@ export class UserService {
         _count: {
           select: {
             reports: true,
-            eventRegistrations: true,
+            eventRegistrations: {
+              where: { attended: true },
+            },
             organizedEvents: true,
           },
         },