[CHANGE] Updated string maxsize on entities. Setup lib dbcontext

Manager.Data/Models/LibraryContext/ChannelEntity.cs

@@ -1,15 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace Manager.Data.Models.LibraryContext;
 
-public class ChannelEntity
+public class ChannelEntity : DateTimeBase
 {
+    [MaxLength(DataConstants.DbContext.DefaultDbStringSize)]
     public required string Id { get; set; }
+    [MaxLength(DataConstants.DbContext.DefaultDbStringSize)]
     public string? Name { get; set; }
+    [MaxLength(DataConstants.DbContext.DefaultDbDescriptionStringSize)]
     public string? Description { get; set; }
     public DateTime JoinedDate { get; set; }
     public long Subscribers { get; set; }
     public long TotalVideos { get; set; }
     public long TotalViews { get; set; }
-    
-    public DateTime AddedDate { get; set; }
-    public DateTime ModifiedDate { get; set; }
 }