Offline RL datasets

Git extra offline. Hugging Face dumps are not published yet.

pip install 'netforge-rl[offline]'
netforge collect --policy heuristic-blue --red killchain-red \
  --episodes 8 --quality mixed --out netforge_offline.npz
netforge collect --hdf5 --out netforge_offline.hdf5

export_npz / export_hdf5 are Minari-shaped without importing minari. Mix random / heuristic / RL / self-play / LLM; tag quality before fine-tune.