Chapter/Issue level Reviews and Ratings (#3778)

Co-authored-by: Joseph Milazzo <josephmajora@gmail.com>

API/Entities/Metadata/ExternalRating.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using API.Entities.Enums;
 using API.Services.Plus;
 
 namespace API.Entities.Metadata;
@@ -10,8 +11,13 @@ public class ExternalRating
     public int AverageScore { get; set; }
     public int FavoriteCount { get; set; }
     public ScrobbleProvider Provider { get; set; }
+    public RatingAuthority Authority { get; set; } = RatingAuthority.User;
     public string? ProviderUrl { get; set; }
     public int SeriesId { get; set; }
+    /// <summary>
+    /// This can be null when for a series-rating
+    /// </summary>
+    public int? ChapterId { get; set; }
 
     public ICollection<ExternalSeriesMetadata> ExternalSeriesMetadatas { get; set; } = null!;
 }