Add initializer.

Author: SebastianStehle

backend/src/Squidex.Data.EntityFramework/ServiceExtensions.cs

@@ -45,6 +45,7 @@
 using Squidex.Infrastructure.Caching;
 using Squidex.Infrastructure.Log;
 using Squidex.Infrastructure.Migrations;
+using Squidex.Infrastructure.Queries;
 using Squidex.Infrastructure.States;
 using Squidex.Infrastructure.UsageTracking;
 using Squidex.Messaging;
@@ -260,6 +261,7 @@ private static void AddSquidexEntityFramework<TContext, TContextContext>(this IS
             .AddEntityFrameworkStore<TContext, CronJobContext>();
 
         services.AddEntityFrameworkAssetKeyValueStore<TContext, TusMetadata>();
+        services.AddSingletonAs<SqlDialectInitializer<TContext>>();
     }
 
     public static void AddSquidexEntityFrameworkEventStore(this IServiceCollection services, IConfiguration config)