docs/curation_pipeline.md: point at MultimodalData/twm/scripts/ now that one-shot scripts have been migrated out of /tmp/ into a versioned home.

Re-label freeze classifier: events are OptiTrack track losses (ot_loss), not recorder-pipeline stalls. GelSight stream is healthy throughout; tac_dup was misread (gel only changes under contact deformation).

Visualization refactor (twm/viz.py single source); native 1280x480 + left|middle|right cam order; freeze_diagnose/ replaces freeze_check/ and freeze_classify/; finding: all freezes are recording-pipeline stalls

docs/curation_pipeline.md: add BGR-vs-RGB channel-order gotcha

Regen previews at 256-color palette; 3-cam dataloader gif; add docs/curation_pipeline.md