* 1.refactor the retrieval module. 2.refactor the http service module. 3.upgrade text2sql output format the parse for absolute time related expression in query.
* fix bug.
* upgrade the config module, now support config llm suppoted by langchain.
* fix conflicts.
* update text2sql config reload to be compitable with new config format.
* modify default config.
* 1.add self-consistency feature for text2sql. 2.upgrade llm api call from sync to async. 3.refactor text2sql module. 4. refactor semantical retriever modules.
* merege with upstream master
* add general retrieve service.
* add api service for sql_agent for crud opereations of few-shots examples.
* modify requirements
* add auto-cot feature
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Co-authored-by: shaoweigong <shaoweigong@tencent.com>
