WIP: add missing handlers, services nd repositories

kontor-echo/internal/repository/media_file.go

@@ -67,11 +67,10 @@ func (repository *MediaFileRepository) Add(context context.Context, url string)
 }
 
 func (repository *MediaFileRepository) Delete(context context.Context, id string) error {
-	var file = models.MediaFile{ID: id}
 	slog.Info("MediaFileRepository#Delete", "id", id)
-	result := repository.db.Delete(&file)
-	if result.Error != nil {
-		slog.Info("MediaFileRepository#Delete", "error", result.Error.Error())
+	_, err := repository.db.NewDelete().Model((*models.MediaFile)(nil)).Where("id = ?", id).Exec(context)
+	if err != nil {
+		slog.Info("MediaFileRepository#Delete", "error", err.Error())
 	}
-	return result.Error
+	return err
 }