refactor,feat: 批量代码重构与新增业务模块

1. 重命名枚举项与实体字段，修正类型引用
2. 新增IsNull扩展方法与多项字符串处理扩展
3. 新增大量业务DTO、服务接口与枚举定义
4. 重构RabbitMQ服务实现，替换旧版消息队列组件
5. 优化签到服务的宠物喂养事务逻辑
6. 移除冗余的项目引用与旧版消息队列代码
7. 新增Excel导出、导入模板相关工具方法

QYZH.InteractiveMagazine.WebApi/appsettings.json

@@ -13,12 +13,13 @@
     "Sentinels": [],
     "ExpireSecondRange": [ 3600, 7200 ]
   },
-  "RabbitMQSettings": {
+  "RabbitMq": {
     "HostName": "192.168.20.150",
     "Port": 5672,
     "UserName": "smartschool",
     "Password": "@ss%&*otz%d*pq2S",
-    "VirtualHost": "InteractiveMagazine"
+    "VirtualHost": "InteractiveMagazine",
+    "ClientProvidedName": "Custom connection name"
   },
   "WeChatSettings": {
     "AppId": "wx7922cc9b6023f3ac",