TF-3589 Calendar event attendance status

lib/features/email/presentation/model/blob_calendar_event.dart

@@ -1,18 +1,26 @@
 import 'package:equatable/equatable.dart';
 import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/calendar/attendance/calendar_event_attendance.dart';
 import 'package:jmap_dart_client/jmap/mail/calendar/calendar_event.dart';
 
 class BlobCalendarEvent with EquatableMixin {
   final Id blobId;
   final List<CalendarEvent> calendarEventList;
   final bool isFree;
+  final AttendanceStatus? attendanceStatus;
 
   BlobCalendarEvent({
     required this.blobId,
     required this.calendarEventList,
     this.isFree = true,
+    this.attendanceStatus,
   });
 
   @override
-  List<Object?> get props => [blobId, calendarEventList, isFree];
+  List<Object?> get props => [
+    blobId,
+    calendarEventList,
+    isFree,
+    attendanceStatus,
+  ];
 }