feat: Enhance Streamlit AI Chat prompts for analysis explanations

[fukusuket]

Summary

Streamlit allows AI Chat to analyze results on every query execution, but the prompt needs improvement. We will optimize the prompt to make the instructions more concise and user-friendly.

Problem / Motivation

Proposed Solution

Module(s) Affected

• ingester (Rust)
• agent (Python / Streamlit)
• config_viz (FastAPI + React)
• dashboard (Apache Superset)
• Docker / docker-compose
• Documentation

Alternatives Considered

Additional Context