### Search before asking - [x] I searched in the [issues](https://github.com/alibaba/fluss/issues) and found nothing similar. ### Description Follow the initial code import guideline of ASF https://incubator.apache.org/guides/transitioning_asf.html#initial_clean_up , we should: 1. Update source files use the standard Apache boilerplate headers. 2. Update NOTICE and LICENSE to reflect correct new copyright. ### Willingness to contribute - [x] I'm willing to submit a PR!
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Description
Follow the initial code import guideline of ASF https://incubator.apache.org/guides/transitioning_asf.html#initial_clean_up , we should:
Willingness to contribute