Restore v6 simple rules as latest successful dataset

Add precomputed oracle task metrics

Restore simple phase-1 rules as latest dataset

Update to v8-relational-curriculum-90: relational curriculum train mix

Delete data/test-00000-of-00001.parquet with huggingface_hub

Upload dataset

Update Eleusis simple rules to v6-standard-deck-phase1-regions-24

Update Eleusis simple rules to v5-standard-deck-balanced-36

Upload v2-simple-56