Drop 2026-03-23 right-only pilot (outdated); recompute totals across 27 bimanual recordings

Lead with robot-arm-free / human-hand collection — README hero + 'What's different' section, tasks.json gets operator/embodiment fields, recording.md explains setup, F7 adds Operator column

Reframe dataset as dynamics / world-model interaction data (not policy demos); document 2026-03-23 as right-sensor-only pilot; add active_sensors per-date in tasks.json; lead with hours and contact frames instead of episode count

Drop 2026-05-11/episode_{000,002} (no-contact test recordings)

Add tasks.json registry; README per-task configs and task-first schema