Moved to appropriate place

dotnet/AipsCore/Infrastructure/Persistence/Db/StartupExtensions.cs

@@ -0,0 +1,15 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace AipsCore.Infrastructure.Persistence.Db;
+
+public static class StartupExtensions
+{
+    public static async Task InitializeInfrastructureAsync(this IServiceProvider services)
+    {
+        using var scope = services.CreateScope();
+
+        var serviceProvider = scope.ServiceProvider;
+
+        await DbInitializer.SeedRolesAsync(serviceProvider);
+    }
+}