feat(db): AddArenaTwoPick migration (rewards + viewer-run tables)

Register ArenaTwoPickRewards and ViewerArenaTwoPickRuns DbSets in SVSimDbContext and generate the AddArenaTwoPick migration with both CreateTable calls, all four jsonb columns on the run table, and the correct indexes (WinCount scalar + unique WinCount/RewardType/RewardId on rewards; unique ViewerId on runs).

SVSim.Database/Migrations/20260531141959_AddArenaTwoPick.cs

@@ -0,0 +1,90 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace SVSim.Database.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddArenaTwoPick : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "ArenaTwoPickRewards",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    WinCount = table.Column<int>(type: "integer", nullable: false),
+                    RewardType = table.Column<int>(type: "integer", nullable: false),
+                    RewardId = table.Column<long>(type: "bigint", nullable: false),
+                    RewardNum = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ArenaTwoPickRewards", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ViewerArenaTwoPickRuns",
+                columns: table => new
+                {
+                    Id = table.Column<long>(type: "bigint", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    ViewerId = table.Column<long>(type: "bigint", nullable: false),
+                    EntryId = table.Column<long>(type: "bigint", nullable: false),
+                    RewardScheduleId = table.Column<int>(type: "integer", nullable: false),
+                    ChallengeId = table.Column<int>(type: "integer", nullable: false),
+                    MaxBattleCount = table.Column<int>(type: "integer", nullable: false),
+                    ClassId = table.Column<int>(type: "integer", nullable: false),
+                    LeaderSkinId = table.Column<long>(type: "bigint", nullable: false),
+                    CandidateClassIdsJson = table.Column<string>(type: "jsonb", nullable: false),
+                    SelectTurn = table.Column<int>(type: "integer", nullable: false),
+                    IsSelectCompleted = table.Column<bool>(type: "boolean", nullable: false),
+                    SelectedCardIdsJson = table.Column<string>(type: "jsonb", nullable: false),
+                    PendingPickSetsJson = table.Column<string>(type: "jsonb", nullable: false),
+                    NextCandidateId = table.Column<long>(type: "bigint", nullable: false),
+                    ResultListJson = table.Column<string>(type: "jsonb", nullable: false),
+                    WinCount = table.Column<int>(type: "integer", nullable: false),
+                    LossCount = table.Column<int>(type: "integer", nullable: false),
+                    IsRetire = table.Column<bool>(type: "boolean", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ViewerArenaTwoPickRuns", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ArenaTwoPickRewards_WinCount",
+                table: "ArenaTwoPickRewards",
+                column: "WinCount");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ArenaTwoPickRewards_WinCount_RewardType_RewardId",
+                table: "ArenaTwoPickRewards",
+                columns: new[] { "WinCount", "RewardType", "RewardId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ViewerArenaTwoPickRuns_ViewerId",
+                table: "ViewerArenaTwoPickRuns",
+                column: "ViewerId",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ArenaTwoPickRewards");
+
+            migrationBuilder.DropTable(
+                name: "ViewerArenaTwoPickRuns");
+        }
+    }
+}

SVSim.Database/Migrations/SVSimDbContextModelSnapshot.cs

@@ -450,6 +450,36 @@ namespace SVSim.Database.Migrations
                     b.ToTable("ArenaSeasons");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.ArenaTwoPickReward", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<long>("RewardId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("RewardNum")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("RewardType")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("WinCount")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WinCount");
+
+                    b.HasIndex("WinCount", "RewardType", "RewardId")
+                        .IsUnique();
+
+                    b.ToTable("ArenaTwoPickRewards");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.AvatarAbilityEntry", b =>
                 {
                     b.Property<int>("Id")
@@ -2482,6 +2512,83 @@ namespace SVSim.Database.Migrations
                     b.ToTable("ViewerAchievements");
                 });
 
+            modelBuilder.Entity("SVSim.Database.Models.ViewerArenaTwoPickRun", b =>
+                {
+                    b.Property<long>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bigint");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<long>("Id"));
+
+                    b.Property<string>("CandidateClassIdsJson")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<int>("ChallengeId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("ClassId")
+                        .HasColumnType("integer");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("EntryId")
+                        .HasColumnType("bigint");
+
+                    b.Property<bool>("IsRetire")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("IsSelectCompleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<long>("LeaderSkinId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("LossCount")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("MaxBattleCount")
+                        .HasColumnType("integer");
+
+                    b.Property<long>("NextCandidateId")
+                        .HasColumnType("bigint");
+
+                    b.Property<string>("PendingPickSetsJson")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<string>("ResultListJson")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<int>("RewardScheduleId")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("SelectTurn")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("SelectedCardIdsJson")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<long>("ViewerId")
+                        .HasColumnType("bigint");
+
+                    b.Property<int>("WinCount")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ViewerId")
+                        .IsUnique();
+
+                    b.ToTable("ViewerArenaTwoPickRuns");
+                });
+
             modelBuilder.Entity("SVSim.Database.Models.ViewerBattlePassClaimEntry", b =>
                 {
                     b.Property<long>("Id")

SVSim.Database/SVSimDbContext.cs

@@ -101,6 +101,9 @@ public class SVSimDbContext : DbContext
 
     public DbSet<ViewerClaimedTutorialGift> ViewerClaimedTutorialGifts => Set<ViewerClaimedTutorialGift>();
 
+    public DbSet<ArenaTwoPickReward> ArenaTwoPickRewards { get; set; } = null!;
+    public DbSet<ViewerArenaTwoPickRun> ViewerArenaTwoPickRuns { get; set; } = null!;
+
     #endregion
 
     public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)