调整数据库结构，实现消息模板管理

Atomx.Common/Entities/Channel.cs

@@ -0,0 +1,77 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Atomx.Common.Entities
+{
+    [Table("Channels")]
+    public class Channel
+    {
+        /// <summary>
+        /// 数据ID
+        /// </summary>
+        [DatabaseGenerated(DatabaseGeneratedOption.None)]
+        [Key]
+        public int Id { get; set; }
+
+        /// <summary>
+        /// 站点ID
+        /// </summary>
+        public long SiteId { get; set; }
+
+        /// <summary>
+        /// 通道类型,例如通知、支付、登录等
+        /// </summary>
+        public int Type { get; set; }
+
+        /// <summary>
+        /// 通道网络，例如API、SMS、Email,MQTT,区块链网络等
+        /// </summary>
+        public int Network { get; set; }
+
+        /// <summary>
+        /// 通道名称
+        /// </summary>
+        [Column(TypeName = "varchar(20)")]
+        public string Name { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 通道标题名称
+        /// </summary>
+        [Column(TypeName = "varchar(20)")]
+        public string Title { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 描述说明
+        /// </summary>
+        [Column(TypeName = "varchar(512)")]
+        public string Description { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 通道的设置
+        /// </summary>
+        [Column(TypeName = "text")]
+        public string Config { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 排序
+        /// </summary>
+        public int DisplayOrder { get; set; }
+
+        /// <summary>
+        /// 状态
+        /// </summary>
+        public int Status { get; set; }
+
+        /// <summary>
+        /// 创建时间
+        /// </summary>
+        [Column(TypeName = "timestamptz")]
+        public DateTime CreateTime { get; set; } = DateTime.UtcNow;
+
+        /// <summary>
+        /// 更新时间
+        /// </summary>
+        [Column(TypeName = "timestamptz")]
+        public DateTime? UpdateTime { get; set; }
+    }
+}