Add `SeedInSeparateUowAsync` method.

framework/src/Volo.Abp.Data/Volo/Abp/Data/DataSeeder.cs

@@ -25,13 +25,21 @@ public class DataSeeder : IDataSeeder, ITransientDependency
     {
         using (var scope = ServiceScopeFactory.CreateScope())
         {
+            var manager = scope.ServiceProvider.GetRequiredService<IUnitOfWorkManager>();
             foreach (var contributorType in Options.Contributors)
             {
-                var contributor = (IDataSeedContributor)scope
-                    .ServiceProvider
-                    .GetRequiredService(contributorType);
+                using (var uow = manager.Begin(
+                           requiresNew: context.Properties.ContainsKey(nameof(DataSeederExtensions.SeedInSeparateUowAsync)),
+                           isTransactional: true))
+                {
+                    var contributor = (IDataSeedContributor)scope
+                        .ServiceProvider
+                        .GetRequiredService(contributorType);
 
-                await contributor.SeedAsync(context);
+                    await contributor.SeedAsync(context);
+
+                    await uow.CompleteAsync();
+                }
             }
         }
     }

framework/src/Volo.Abp.Data/Volo/Abp/Data/DataSeederExtensions.cs

@@ -9,4 +9,9 @@ public static class DataSeederExtensions
     {
         return seeder.SeedAsync(new DataSeedContext(tenantId));
     }
+
+    public static Task SeedInSeparateUowAsync(this IDataSeeder seeder, Guid? tenantId = null)
+    {
+        return seeder.SeedAsync(new DataSeedContext(tenantId).WithProperty(nameof(DataSeederExtensions.SeedInSeparateUowAsync), true));
+    }
 }