fix(AlarmModel): correct fromJson initialization (#867) (#868)

Author: dorodb-web22

lib/app/data/models/alarm_model.dart

@@ -347,9 +347,8 @@ class AlarmModel {
     ringOn = alarmData['ringOn'];
   }
 
-  AlarmModel.fromJson(String alarmData, UserModel? user) {
-    AlarmModel.fromMap(jsonDecode(alarmData));
-  }
+  AlarmModel.fromJson(String alarmData, UserModel? user)
+      : this.fromMap(jsonDecode(alarmData) as Map<String, dynamic>);
 
   static String toJson(AlarmModel alarmRecord) {
     return jsonEncode(AlarmModel.toMap(alarmRecord));