Trim OT-uninitialized prefixes from 3 .pt files (ep_005/012/017 — see `_contact_meta.trim_offset`); recompute bad_frames + data_quality_breakdown in trimmed coords; ot_loss frame count now reflects real mid-episode mocap dropout only. Recorder-side OT watchdog added to data_collection.py (in twm repo) so future episodes won't repeat the bug.

Drop 2026-03-23 right-only pilot (outdated); recompute totals across 27 bimanual recordings

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

Restructure to task-first layout: <task>/<date>/episode_*

Add processed mode1_v1 / 2026-05-11 (17 episodes)

Add processed dataset (mode1_v1: 2026-03-23 + 2026-05-10)