Things were working, suddenly regressed

SVSim.EmulatedEntrypoint/Models/Dtos/UserRankInfo.cs

@@ -1,14 +1,18 @@
 using MessagePack;
 using System.Text.Json.Serialization;
+using SVSim.Database.Enums;
 
 namespace SVSim.EmulatedEntrypoint.Models.Dtos;
 
 [MessagePackObject]
 public class UserRankInfo
 {
+    // Serialized as wire deck_format via FormatJsonConverter (registered globally in
+    // Program.cs). Storing as Format makes wrong-int-scope bugs (sending internal enum
+    // ints instead of wire codes) a compile error.
     [JsonPropertyName("deck_format")]
     [Key("deck_format")]
-    public int DeckFormat { get; set; }
+    public Format DeckFormat { get; set; }
     [JsonPropertyName("rank")]
     [Key("rank")]
     public int Rank { get; set; }