fix: add chat template to GRPO prompts

fix(sft): T4/Colab-friendly defaults (grad checkpoint, batch 2/accum 8) + CLI flags

fix(sft): pick SFTConfig max_length vs max_seq_length by TRL version at runtime

fix(sft): TRL 1.0+ uses max_length in SFTConfig, not max_seq_length

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)

feat: streamline parlay for demo mode and add spectator negotiation mechanics

feat: split Gemini 2.5 Flash (demo) and Flash-Lite (data), SFT threshold 0.3, favicon + check_gemini

feat: project setup