✨ Web articles and feed

DysonNetwork.Sphere/Connection/WebReader/WebArticle.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace DysonNetwork.Sphere.Connection.WebReader;
+
+public class WebArticle : ModelBase
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    [MaxLength(4096)] public string Title { get; set; }
+    [MaxLength(8192)] public string Url { get; set; }
+    [MaxLength(4096)] public string? Author { get; set; }
+    
+    [Column(TypeName = "jsonb")] public Dictionary<string, object>? Meta { get; set; }
+    [Column(TypeName = "jsonb")] public LinkEmbed? Preview { get; set; }
+
+    // ReSharper disable once EntityFramework.ModelValidation.UnlimitedStringLength
+    public string? Content { get; set; }
+
+    public DateTime? PublishedAt { get; set; }
+
+    public Guid FeedId { get; set; }
+    public WebFeed Feed { get; set; } = null!;
+}
+
+public class WebFeed : ModelBase
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    [MaxLength(8192)] public string Url { get; set; }
+    [MaxLength(4096)] public string Title { get; set; }
+    [MaxLength(8192)] public string? Description { get; set; }
+    
+    [Column(TypeName = "jsonb")] public LinkEmbed? Preview { get; set; }
+
+    public Guid PublisherId { get; set; }
+    public Publisher.Publisher Publisher { get; set; } = null!;
+
+    public ICollection<WebArticle> Articles { get; set; } = new List<WebArticle>();
+}