Getting ready to seed more data

SVSim.EmulatedEntrypoint/Models/Dtos/ClassExp.cs

@@ -1,16 +1,21 @@
 using MessagePack;
+using System.Text.Json.Serialization;
 
 namespace SVSim.EmulatedEntrypoint.Models.Dtos;
 
 [MessagePackObject]
 public class ClassExp
 {
+    [JsonPropertyName("level")]
     [Key("level")]
     public int Level { get; set; }
+    [JsonPropertyName("necessary_exp")]
     [Key("necessary_exp")]
     public int NecessaryExp { get; set; }
+    [JsonPropertyName("diff_exp")]
     [Key("diff_exp")]
     public int DiffExp { get; set; }
+    [JsonPropertyName("accumulate_exp")]
     [Key("accumulate_exp")]
     public int AccumulateExp { get; set; }
 }