Peer Review Rubric: Reproducibility + Eval Rigour + Engineering + TR-Domain Fit

Cookbook's peer review system: capstone projects reviewed by community members. 4 categories × 25 points: Reproducibility (lineage triple, env pinning, open repo), Eval rigour (TR-MMLU + domain bench + bias eval), Engineering quality (MFU >35%, code organization), TR-domain fit (real usage potential). 100 total, 70+ → certification.