[FA-misc] Saga seems to work, fixed a UserNovelDataService bug

FictionArchive.Service.NovelService/Models/ActiveImport.cs

@@ -0,0 +1,10 @@
+using NodaTime;
+
+namespace FictionArchive.Service.NovelService.Models;
+
+public class ActiveImport
+{
+    public Guid ImportId { get; set; }
+    public required string NovelUrl { get; set; }
+    public Instant StartedAt { get; set; }
+}