来个文档支持：任务运行的流程图（便于理解任务每一步关键的执行类）
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- Java
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Description
### Search before asking
- [X] I had searched in the [issues](https://github.com/DTStack/Taier/issues) and found no similar feature requirement.
### Description
希望整理一张类似这样的流程图，可以标注关键的任务执行类，
以便于理解源码关键的每一步。
### Use case
_No response_
### Related issues
_No response_
### Are you willing to submit a PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
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