update dashboard: adaptive RAG radar, 3-line per-question chart, full metric headers

add adaptive-rag as 8th system with perfect faithfulness (1.000)

revert to working custom sidebar state

use Streamlit native sidebar, remove custom HTML sidebar

fix blank space - internal scroll at 900px height

fix layout for HF deployment - natural page scroll

fix Dockerfile to run dashboard/app.py

Deploy RAG benchmark dashboard