Re-add per-file dataset configs (was overwritten)

Repackage trajectories.tar.gz with full bundle (NoRet evals + demo pools + server logs, 1,940 files)

Add per-file dataset configs to fix first-rows schema conflict

Update Croissant URLs to HF + add dataset card YAML

Initial release: Croissant 1.0 metadata + per-task outcomes + trajectories archive

initial commit