fix(cv): make initial revision atomic

JobTrackerApi.Tests/CvBuilderTests.cs

@@ -1,6 +1,7 @@
 using JobTrackerApi.Data;
 using JobTrackerApi.Models;
 using JobTrackerApi.Services;
+using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore;
 using Moq;
 using Xunit;
@@ -366,6 +367,26 @@ public sealed class CvBuilderTests
         Assert.True(versions[0].IsCurrent);
     }
 
+    [Fact]
+    public async Task Create_persists_variant_and_initial_history_on_a_relational_store()
+    {
+        await using var connection = new SqliteConnection("Data Source=:memory:");
+        await connection.OpenAsync();
+        var options = new DbContextOptionsBuilder<JobTrackerContext>().UseSqlite(connection).Options;
+        var currentUser = new Mock<ICurrentUserService>();
+        currentUser.SetupGet(service => service.UserId).Returns("user-1");
+        await using var db = new JobTrackerContext(options, currentUser.Object);
+        await db.Database.EnsureCreatedAsync();
+        var service = new CvVariantService(db, new CareerProfileService(db), new ThemedCvRenderer());
+
+        var created = await service.CreateAsync("user-1", "Atomic CV", null, new CvVariantSettings(), default);
+
+        Assert.Single(await db.CvVariants.IgnoreQueryFilters().Where(item => item.Id == created.Id).ToListAsync());
+        var history = await db.CvVariantVersions.IgnoreQueryFilters().Where(item => item.CvVariantId == created.Id).ToListAsync();
+        Assert.Single(history);
+        Assert.Equal(1, history[0].Version);
+    }
+
     [Fact]
     public async Task Restore_reapplies_old_settings_as_a_new_version()
     {