[Feature] 增加agent和RAG评估功能

[DurantChan1]

MaxKB Version

v2.9.2 (build at 2026-05-19T18:09, commit: 566fd31)

Please describe your needs or suggestions for improvements

针对Agent和RAG支持评估系统，可以融入Ragas等框架

Please describe the solution you suggest

No response

Additional Information

No response