Fineweb dataset migration and copycat detection hotfix

τeuτonic is migrating to the Fineweb dataset via Hippius mirror for better convergence benchmarking. The team deployed a temporary validator hotfix to block models with "Duplicate" in commit messages, addressing persistent copycats who instantly replicate high-performing submissions. Full dataset is now available; validation code updated and re-evaluation underway.

• •Switched datamix to Fineweb-edu via public Hippius S3 mirror for standardized benchmarking
• •Deployed validator guard: skips models with "Duplicate" in commit message, marks as failed
• •Evaluation stuck; restarted from uid 20 after code update and deployment