Getting ready to seed more data

SVSim.EmulatedEntrypoint/Models/Dtos/Responses/Practice/PracticeStartResponse.cs

@@ -1,4 +1,5 @@
 using MessagePack;
+using System.Text.Json.Serialization;
 
 namespace SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Practice;
 
@@ -8,7 +9,8 @@ public class PracticeStartResponse
     /// <summary>
     /// Optional mission/achievement evaluation snapshot. Spec: safe to omit entirely;
     /// client tolerates absence (defensive `Keys.Contains` check). Always null in our
-    /// minimal impl — we don't model missions.
+    /// minimal impl 窶・we don't model missions.
     /// </summary>
+    [JsonPropertyName("mission_parameter")]
     [Key("mission_parameter")] public object? MissionParameter { get; set; }
 }