fix(llc): fix event model

packages/stream_chat/lib/src/core/models/event.dart

@@ -183,7 +183,7 @@ class EventChannel extends ChannelModel {
     DateTime? deletedAt,
     required int memberCount,
     Map<String, Object?>? extraData,
-    required int cooldown,
+    int cooldown = 0,
     String? team,
   }) : super(
           id: id,

packages/stream_chat/lib/src/core/models/event.g.dart

@@ -84,6 +84,6 @@ EventChannel _$EventChannelFromJson(Map<String, dynamic> json) => EventChannel(
           : DateTime.parse(json['deleted_at'] as String),
       memberCount: json['member_count'] as int,
       extraData: json['extra_data'] as Map<String, dynamic>?,
-      cooldown: json['cooldown'] as int,
+      cooldown: json['cooldown'] as int? ?? 0,
       team: json['team'] as String?,
     );