feat: 补充部分功能

Yi.Abp.Net8/module/ai-stock/Yi.Framework.Stock.Domain/Entities/StockNewsAggregateRoot.cs

@@ -22,7 +22,7 @@ namespace Yi.Framework.Stock.Domain.Entities
         /// <summary>
         /// 创建时间
         /// </summary>
-        public DateTime CreationTime { get; set; } = DateTime.Now;
+        public DateTime CreationTime { get; set; }
 
         /// <summary>
         /// 创建者ID
@@ -57,13 +57,18 @@ namespace Yi.Framework.Stock.Domain.Entities
         /// <summary>
         /// 发布时间
         /// </summary>
-        public DateTime PublishTime { get; set; } = DateTime.Now;
+        public DateTime PublishTime { get; set; }
 
         /// <summary>
         /// 新闻来源
         /// </summary>
         public string Source { get; set; } = string.Empty;
 
+        /// <summary>
+        /// 新闻摘要
+        /// </summary>
+        public string Summary { get; set; } = string.Empty;
+
         public StockNewsAggregateRoot() { }
 
         public StockNewsAggregateRoot(