Fix row-count mismatch in extract_episode for PhAIL signals

Rewrite PhAIL loader: static.json-driven episode discovery

Robust PhAIL column detection + debug logging + graceful empty-data error

Fix Progress object truthiness check in load_phail_sample

Add PhAIL tab: 4 autonomous VLA policies head-to-head on Franka

fix: handle mismatched state/action dims in extract_episode (Franka 13 vs 15)

add real robot dataset converters and sample CSVs

add HuggingFace Space for robot policy eval harness