Update message_data.dart

lib/core/model/message_data.dart

@@ -65,7 +65,7 @@ class MessageData {
     textVo = json['textVo'] != null ? TextVo.fromJson(json['textVo']) : null;
   }
 
-  num? id;
+  String? id;
   String? messageNo;
   String? accessKey;
   String? companyNo;
@@ -94,7 +94,7 @@ class MessageData {
   bool get isHand => status == 10;
 
   MessageData copyWith({
-    num? id,
+    String? id,
     String? messageNo,
     String? accessKey,
     String? companyNo,