feat(message): 消息类型增加英文代码字段

- 在 MessageReceiversVo 中添加 messageTypeCode 字段
- 在 MessageReceiversServiceImpl 中保存消息类型代码

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/business/domain/vo/MessageReceiversVo.java

@@ -81,6 +81,8 @@ public class MessageReceiversVo implements Serializable {
      */
     private String messageType;
 
+    private String messageTypeCode;
+
     /**
      * 发送时间
      */

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/business/service/impl/MessageReceiversServiceImpl.java

@@ -73,6 +73,7 @@ public class MessageReceiversServiceImpl implements IMessageReceiversService {
             String messageType = record.getMessageType();
             if(StringUtils.isNotBlank(messageType)){
                 record.setMessageType(MessageTypeEnum.getDescriptionByCode(messageType));
+                record.setMessageTypeCode(messageType);
             }