clickhouse

Summary
To invite more developers envolve in community, we could explain more details on how to run all setup, build and tests.
Documentation needed:

1. How to run stateless tests on users' local machine(needs to setup extra tools ie mysql client)
2. How to setup performance tests from scratch

related discussion:
datafuselabs/datafuse#1358 (comment)

1 issue description
2. fix bug, enhance....
3. git commit -m "issue name (#issue number)"

Problem

At present, our API documentation and API configuration in Jitsu Server contain some discrepancies. Since Jitsu API grows fast It's unavoidable. We should improve it. Clear documentation is an essential thing in OSS projects.

Solution

We should create Open API specification (yaml file) and generate both Jitsu Server handlers (gin-gonic) and doc

运行示例代码，如果把user对应的age和uid属性调换一下时，即使绑定了对应的tag，但是仍然按照数据库中顺序进行赋值，数据库的第一列uid对应的了user类的第一个属性age