DTOs for index mostly done, doing DB models

SVSim.EmulatedEntrypoint/Models/Dtos/Internal/DataWrapper.cs

@@ -0,0 +1,22 @@
+using MessagePack;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Internal;
+
+/// <summary>
+/// Wraps responses in the format the official game client expects, with a header section for additional data. Not for manual endpoint use, this wrapping is done automatically in a middleware.
+/// </summary>
+[MessagePackObject]
+public class DataWrapper
+{
+    /// <summary>
+    /// Additional data about the request, response and user.
+    /// </summary>
+    [Key("data_headers")] 
+    public DataHeaders DataHeaders { get; set; } = new DataHeaders();
+
+    /// <summary>
+    /// The response data from the endpoint.
+    /// </summary>
+    [Key("data")] 
+    public object Data { get; set; } = new();
+}