Fix FilterFiles: add cr:FileObject @id =repo + containedIn for both FileSets

Use RAI Editor canonical export (Wikidata Q4929239 prov:type, agent @id , prov:Agent)

Specify NVIDIA Isaac Sim as the simulator (replacing generic engine wording)

Croissant 1.1: add recordSet (NeurIPS required) + all core+RAI fields validated

Update croissant.json: add 8/8 RAI fields (hasSyntheticData + prov:wasDerivedFrom + prov:wasGeneratedBy)

Update README + croissant (simplified, 400-case framing, Croissant validation PASS)

Add metadata: README, croissant, manifest