hygugb

fix: tsdb存储元数据时支持大对象（大于64M）

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fix: tsdb存储元数据时支持大对象（大于64M）issue #5389

canal订阅上游数据库元数据过大（超过64M）导致的fastjson报OutOfMemoryError异常

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- [ ] I have searched the [issues](https://github.com/alibaba/canal/issues) of this repository and believe that this is not a duplicate. - [ ] I have checked the [FAQ](https://github.com/alibaba/canal/wiki/FAQ) of this repository...