feat(db): add ArenaTwoPickReward catalog entity

SVSim.Database/Models/ArenaTwoPickReward.cs

@@ -0,0 +1,29 @@
+// SVSim.Database/Models/ArenaTwoPickReward.cs
+using Microsoft.EntityFrameworkCore;
+using SVSim.Database.Enums;
+
+namespace SVSim.Database.Models;
+
+/// <summary>
+/// One row of the Take Two run-end reward table. Multiple rows per <see cref="WinCount"/>
+/// (e.g. 1 ticket + N rupies = 2 rows). Seeded by <c>ArenaTwoPickRewardImporter</c> from
+/// <c>SVSim.Bootstrap/Data/seeds/arena-two-pick-rewards.json</c>.
+/// </summary>
+[Index(nameof(WinCount))]
+[Index(nameof(WinCount), nameof(RewardType), nameof(RewardId), IsUnique = true)]
+public class ArenaTwoPickReward
+{
+    public long Id { get; set; }
+
+    /// <summary>0..MaxWins. Run ends at LossCount==2 or WinCount==MAX(WinCount).</summary>
+    public int WinCount { get; set; }
+
+    /// <summary><see cref="UserGoodsType"/> on the wire (e.g. Item=4, Rupy=9).</summary>
+    public int RewardType { get; set; }
+
+    /// <summary>Item id for Item; 0 for currencies.</summary>
+    public long RewardId { get; set; }
+
+    /// <summary>Count (e.g. ticket quantity or rupy amount).</summary>
+    public int RewardNum { get; set; }
+}