0.4.0: Claim, Models/ DTOs, compile

LeaderboardSession.ClaimAsync sends onClaim. Generated DTOs live under Models/ with nullable wire fields. Remove incomplete duplicate type files.

Scenarios/UpdateScenarioCounterResponse.cs

@@ -1,7 +1,5 @@
 // Code generated by apigen. DO NOT EDIT.
 using Newtonsoft.Json;
-using Newtonsoft.Json.Linq;
-using System.Collections.Generic;
 using RudderSdk.Core.Models;
 
 namespace RudderSdk.Core.Models.Scenarios;
@@ -9,9 +7,9 @@ namespace RudderSdk.Core.Models.Scenarios;
 public class UpdateScenarioCounterResponse
 {
     [JsonProperty("completed")]
-    public bool Completed { get; set; }
+    public bool? Completed { get; set; }
 
     [JsonProperty("plan")]
-    public ExecutionPlan Plan { get; set; }
+    public ExecutionPlan? Plan { get; set; }
 
 }