feat(repo): IArenaTwoPickRunRepository + tests

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

SVSim.UnitTests/Repositories/ArenaTwoPickRunRepositoryTests.cs

@@ -0,0 +1,72 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using SVSim.Database;
+using SVSim.Database.Models;
+using SVSim.Database.Repositories.Viewer;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Repositories;
+
+public class ArenaTwoPickRunRepositoryTests
+{
+    private static async Task<(SVSimDbContext, ArenaTwoPickRunRepository)> SetupAsync()
+    {
+        var factory = new SVSimTestFactory();
+        var scope = factory.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+        await db.Database.EnsureCreatedAsync();
+        return (db, new ArenaTwoPickRunRepository(db));
+    }
+
+    [Test]
+    public async Task GetByViewerId_returns_null_when_no_run()
+    {
+        var (db, repo) = await SetupAsync();
+        await using var _ = db;
+        var run = await repo.GetByViewerIdAsync(viewerId: 42);
+        Assert.That(run, Is.Null);
+    }
+
+    [Test]
+    public async Task Insert_then_fetch_round_trips_jsonb_columns()
+    {
+        var (db, repo) = await SetupAsync();
+        await using var _ = db;
+
+        var run = new ViewerArenaTwoPickRun
+        {
+            ViewerId = 42,
+            EntryId = 0,
+            RewardScheduleId = 1,
+            ChallengeId = 1,
+            MaxBattleCount = 7,
+            CandidateClassIdsJson = "[1,7,8]",
+            SelectedCardIdsJson = "[]",
+            PendingPickSetsJson = "[]",
+            ResultListJson = "[]",
+            CreatedAt = DateTime.UtcNow,
+            UpdatedAt = DateTime.UtcNow,
+        };
+        await repo.UpsertAsync(run);
+
+        var fetched = await repo.GetByViewerIdAsync(42);
+        Assert.That(fetched, Is.Not.Null);
+        Assert.That(fetched!.CandidateClassIdsJson, Is.EqualTo("[1,7,8]"));
+        Assert.That(fetched.MaxBattleCount, Is.EqualTo(7));
+    }
+
+    [Test]
+    public async Task Delete_removes_the_row()
+    {
+        var (db, repo) = await SetupAsync();
+        await using var _ = db;
+        await repo.UpsertAsync(new ViewerArenaTwoPickRun
+        {
+            ViewerId = 42, EntryId = 0, MaxBattleCount = 7,
+            CreatedAt = DateTime.UtcNow, UpdatedAt = DateTime.UtcNow,
+        });
+        await repo.DeleteAsync(42);
+        var fetched = await repo.GetByViewerIdAsync(42);
+        Assert.That(fetched, Is.Null);
+    }
+}