Relocate training notebooks, add BLOG and Google Colab links (SFT + GRPO HF Job), dashboard updates, and eval artifacts

docs: added tags to READMEs

Add pre-training audit scripts, OpenEnv manifest, and tune Parlay training/env (GRPO 1.5B default, min-reward filters, weighted data gen, hiring ZOPA+drift, veteran/opponent prompts, Docker/docs)