@Override
    public ScaleRuleVO findById(final String id) {
        return ScaleRuleVO.buildScaleRuleVO(scaleRuleMapper.selectByPrimaryKey(id));
    }
find scale rule by id.

@param id primary key
@return {@linkplain ScaleRuleVO}
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/impl/ScaleRuleServiceImpl.java