Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Private/PrivateEntity.cs

@@ -0,0 +1,52 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace WatchLog.Data
+{
+    public class PrivateEntity
+    {
+        [Key]
+        public int Id { get; set; }
+
+        public bool Favorite { get; set; } = false;
+
+        [MaxLength(1000)]
+        public string? Description { get; set; }
+
+        public int? Season { get; set; }
+
+        public int? Episode { get; set; }
+
+        public int? Rating { get; set; }
+
+        [Required]
+        public required DateTime CreationTime { get; set; }
+
+        public DateTime? LastChange { get; set; }
+
+
+        // --- Foreign Keys ---
+        [Required]
+        public int UserId { get; set; }
+
+        [Required]
+        public int GlobalEntityId { get; set; }
+
+        public int? UserWatchStatusId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(UserId))]
+        public virtual User User { get; set; } = null!;
+
+        [ForeignKey(nameof(GlobalEntityId))]
+        public virtual GlobalEntity GlobalEntity { get; set; } = null!;
+
+        [ForeignKey(nameof(UserWatchStatusId))]
+        public virtual UserWatchStatus? UserWatchStatus { get; set; }
+
+        public virtual ICollection<LinkTablePrivateLabel> PrivateEntityLabels { get; set; } = new List<LinkTablePrivateLabel>();
+
+        public virtual ICollection<LinkTablePrivateStreamingPlatform> PrivateStreamingPlatforms { get; set; } = new List<LinkTablePrivateStreamingPlatform>();
+    }
+}