Update docs and reward progression plot

Fix validator pipeline: python 3.12, grader POST, websockets

Final Expert Tier (0.9+) Candidate — Groq Baseline Verified

feat: Final Professional Judge Console overhaul with expert auto-fill and emoji-free aesthetic. Resolved strategic reward logic and Pydantic validation errors.

Fix imports for flat deployment structure in HF Spaces

Initial commit of PolicyEvolverEnv - Meta Hackathon