add: 元数据提取

YaeBlog.Core/Models/BlogEssay.cs

@@ -6,5 +6,12 @@ public class BlogEssay
 
     public required DateTime PublishTime { get; init; }
 
+    public List<string> Tags { get; } = [];
+
     public required string HtmlContent { get; init; }
+
+    public override string ToString()
+    {
+        return $"{Title}-{PublishTime}";
+    }
 }