Implement code changes to enhance functionality and improve performance

feat: tighten EscalationROI, add ambiguous medium case, LLM note judge wrapper

Refactor evidence building and improve code readability in iso_adapter.py

fix: squash inflated evidence scores for wrongly contested concedable cases

feat: redesign Gradio demo with visual dashboard and update OPENENV.md

feat: add Gradio demo UI, realistic metadata, info dict, and metrics