feat(free-battle): add DoMatchingRequestDto

SVSim.EmulatedEntrypoint/Models/Dtos/FreeBattle/DoMatchingRequestDto.cs

@@ -0,0 +1,46 @@
+using System.Text.Json.Serialization;
+using MessagePack;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
+
+namespace SVSim.EmulatedEntrypoint.Models.Dtos.FreeBattle;
+
+/// <summary>
+/// Standard DoMatchingParam shape for free battle (rotation/unlimited). Identical wire
+/// shape to the rank-battle variant — see Models/Dtos/RankBattle/DoMatchingRequestDto.cs.
+/// Mirrored (not reused) so each family owns its namespace; consolidate when a third
+/// matched-PvP family lands.
+///
+/// Inherits viewer_id / steam_id / steam_session_ticket from <see cref="BaseRequest"/>
+/// so the auth fields survive the translation-middleware msgpack → DTO → JSON round-trip.
+/// </summary>
+[MessagePackObject]
+public sealed class DoMatchingRequestDto : BaseRequest
+{
+    [JsonPropertyName("deck_no")]
+    [Key("deck_no")]
+    public int DeckNo { get; set; }
+
+    [JsonPropertyName("need_init")]
+    [Key("need_init")]
+    public int NeedInit { get; set; }
+
+    [JsonPropertyName("card_master_hash")]
+    [Key("card_master_hash")]
+    public string? CardMasterHash { get; set; }
+
+    [JsonPropertyName("log")]
+    [Key("log")]
+    public int Log { get; set; }
+
+    [JsonPropertyName("use_stage_select")]
+    [Key("use_stage_select")]
+    public int UseStageSelect { get; set; }
+
+    [JsonPropertyName("excluded_field_id_list")]
+    [Key("excluded_field_id_list")]
+    public List<long> ExcludedFieldIdList { get; set; } = new();
+
+    [JsonPropertyName("is_default_skin")]
+    [Key("is_default_skin")]
+    public int IsDefaultSkin { get; set; }
+}