0.3.0 - Upgrade agent runtime to LangGraph v1

OpenChatBI has upgraded its agent runtime to LangGraph v1 and currently targets langgraph==1.1.10.
This upgrade also brings in the LangChain 1.x ecosystem and related compatibility changes.
If you do not want to depend on LangGraph v1, please use OpenChatBI v0.2.2 or an earlier release.

Highlights:

1. Upgrade langgraph to v1(1.1.10)
2. Add SQL safety validation before Text2SQL execution
3. Text2SQL graph enhancement

Full Changelog: v0.2.2...v0.3.0