初步完成邮件功能

DMS.Application/DTOs/EmailLogDto.cs

@@ -0,0 +1,38 @@
+namespace DMS.Application.DTOs
+{
+    /// <summary>
+    /// 邮件日志DTO
+    /// </summary>
+    public class EmailLogDto
+    {
+        /// <summary>
+        /// 日志ID
+        /// </summary>
+        public int Id { get; set; }
+
+        /// <summary>
+        /// 关联的邮件ID
+        /// </summary>
+        public int EmailMessageId { get; set; }
+
+        /// <summary>
+        /// 日志级别
+        /// </summary>
+        public string Level { get; set; }
+
+        /// <summary>
+        /// 日志消息
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <summary>
+        /// 异常详情
+        /// </summary>
+        public string? Exception { get; set; }
+
+        /// <summary>
+        /// 创建时间
+        /// </summary>
+        public DateTime CreatedAt { get; set; }
+    }
+}