chore: Clean up code by removing trailing whitespace in multiple files

internal/repository/system_config_repository_impl.go

@@ -42,3 +42,4 @@ func (r *systemConfigRepositoryImpl) UpdateValue(key, value string) error {
 	return r.db.Model(&model.SystemConfig{}).Where("key = ?", key).Update("value", value).Error
 }
 
+