feat: bulletproof GRPO training script + Colab notebook

feat: rewrite env to be fully openenv-core compliant

chore: update baseline results with real facts (450 QA pairs)

feat: implement data pipeline

feat: baseline eval and GRPO training script

Updated .gitignore

chore: add CLAUDE.md, README, update gitignore

feat: implement actions, reward, env, server

chore: pin dependencies

feat: initial structure

initial commit