add sqlite support

cmd/background/main.go

@@ -69,9 +69,19 @@ func app(ctx context.Context) error {
 
 	mapper := adapters.NewMemoryMapper(courseThematcisMapped, learningTypeMapped)
 
+	var dbEngine service.RepositoryEngine
+	switch cfg.DBEngine {
+	case DBEngineSqlite:
+		dbEngine = service.RepositoryEngineSqlite
+	case DBEngineYDB:
+		dbEngine = service.RepositoryEngineYDB
+	}
+
 	app, err := service.NewApplication(ctx, service.ApplicationConfig{
 		LogConfig: cfg.Log,
 		YDB:       cfg.YDB,
+		Sqlite:    cfg.Sqlite,
+		Engine:    dbEngine,
 	}, mapper)
 	if err != nil {
 		return fmt.Errorf("making new application: %w", err)