Enable saas features of kirin service

[Micost]

Background

We have kirin project which integrate all services together as the platform service. We encourage users to user directly our front end services.There are also demands of directly use api (service as a service). We should response such requirements.

Functions

1. External chat api for users

we can use openai chat api as reference
https://platform.openai.com/docs/api-reference/chat/create
Since we have not only llm chat but also rag chat, there should be one more

Issue
SkywardAI/kirin#351

2. External api key for users

api key can be paid by token number or by time.

External api key management

Issue

SkywardAI/kirin#352

3. Static analyze for api key

Static analysis result of given api key, include

• Top questions
• Hot keys ( top key word)
• Longest conversation
• Question times(earliest and lasted questions)
• Rag chat ratio

Issue
SkywardAI/kirin#353