feat(dto): TK2 common DTOs (entry/class/deck/candidate/results/reward)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

SVSim.EmulatedEntrypoint/Models/Dtos/Common/ArenaTwoPick/DeckInfoDto.cs

@@ -0,0 +1,26 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.Common.ArenaTwoPick;
+
+[MessagePackObject]
+public class DeckInfoDto
+{
+    [JsonPropertyName("two_pick_entry_id")] [JsonConverter(typeof(StringifiedLongConverter))] [Key("two_pick_entry_id")]
+    public long TwoPickEntryId { get; set; }
+
+    [JsonPropertyName("class_id")] [JsonConverter(typeof(StringifiedIntConverter))] [Key("class_id")]
+    public int ClassId { get; set; }
+
+    /// <summary>Native bool on the wire (NOT stringified — matches capture).</summary>
+    [JsonPropertyName("is_select_completed")] [Key("is_select_completed")]
+    public bool IsSelectCompleted { get; set; }
+
+    /// <summary>Native long[] (raw ints in capture). Parser does .ToInt(); emitting as numbers matches prod.</summary>
+    [JsonPropertyName("selected_card_ids")] [Key("selected_card_ids")]
+    public List<long> SelectedCardIds { get; set; } = new();
+
+    [JsonPropertyName("select_turn")] [Key("select_turn")]
+    public int SelectTurn { get; set; }
+}