Update README + docs/{quality,caveats}.md: post-trim totals, three concrete filtering recipes (example dataloader / direct .pt / pose-only), rewritten OT-track-loss section reflecting the prefix-trim + recorder watchdog fix

Bake ot_loss intervals into bad_frames.json (47 events, rotation-aware detector); dataloader skips them; docs/quality + caveats updated; data_quality_breakdown #3 renamed sensor_at_rest → ot_loss

Drop 2026-03-23 right-only pilot (outdated); recompute totals across 27 bimanual recordings

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

Split README into lean front page + docs/{recording,schema,quality,figures,caveats}.md