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.Models/Enum/TaskBankTypeEnum.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QYZH.InteractiveMagazine.Models.Enum
+{
+    public enum TaskBankTypeEnum
+    {
+        /// <summary>
+        /// 无效题目
+        /// </summary>
+        [Description("无效")]
+        Default = 0,
+        /// <summary>
+        /// 单选题
+        /// </summary>
+        [Description("单选题")]
+        Single = 1,
+
+        /// <summary>
+        /// 多选题
+        /// </summary>
+        [Description("多选题")]
+        Multiple = 2,
+
+        /// <summary>
+        /// 判断题
+        /// </summary>
+        [Description("判断题")]
+        Whether = 3,
+
+        /// <summary>
+        /// 填空题
+        /// </summary>
+        [Description("填空题")]
+        FillIn = 4,
+
+        /// <summary>
+        /// 应用题
+        /// </summary>
+        [Description("应用题")]
+        Problem = 5,
+
+        /// <summary>
+        /// 简答题
+        /// </summary>
+        [Description("简答题")]
+        ShortAnswer = 6,
+
+    }
+
+    public class TaskBankType
+    {
+        /// <summary>
+        /// 客观题
+        /// </summary>
+        public TaskBankTypeEnum[] ObjectiveTypes => new[] { TaskBankTypeEnum.Single, TaskBankTypeEnum.Multiple, TaskBankTypeEnum.Whether };
+
+        /// <summary>
+        /// 获取客观题类型的整数值
+        /// </summary>
+        public List<int> ObjectiveTypeValues => ObjectiveTypes.Select(t => (int)t).ToList();
+
+        /// <summary>
+        /// 主观题
+        /// </summary>
+        public TaskBankTypeEnum[] SubjectiveTypes => new[] { TaskBankTypeEnum.FillIn, TaskBankTypeEnum.Problem, TaskBankTypeEnum.ShortAnswer };
+
+        /// <summary>
+        /// 获取主观题类型的整数值
+        /// </summary>
+        public List<int> SubjectiveTypeValues => SubjectiveTypes.Select(t => (int)t).ToList();
+    }
+}