Создание таблиц для цепочек подтверждения (#1)

Co-authored-by: gorbenko.pavel <gorbenko.pavel@tansu.kz>
Reviewed-on: http://git.tnsu.kz/gorbenko.pavel/tnsu-approval-route/pulls/1

backend/src/Tnsu.ApprovalRoute.Infrastructure/InfrastructureServiceCollectionExtensions.cs

@@ -1,3 +1,4 @@
+using Extensions.Hosting.AsyncInitialization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
@@ -11,7 +12,9 @@ public static class InfrastructureServiceCollectionExtensions
         this IServiceCollection services, IConfiguration configuration)
     {
         services.AddDbContext<ApprovalRouteDbContext>(opt =>
-            opt.UseNpgsql(configuration.GetConnectionString("Postgres")));
+            opt.UseNpgsql(configuration.GetConnectionString("Postgres"))
+                .UseSnakeCaseNamingConvention());
+        services.AddAsyncInitializer<DatabaseMigrationInitializer>();
 
         return services;
     }