'Pick up the red ball and place it on the container' -> existing task 0 'Pick up the red foam ball and place it into the container'. 'Pick up the green ball and place it on the container' -> 'Pick up the green rubber ball and place it into the container' (task 3). tasks.parquet, data file-003 task_index, episodes file-003 tasks + task_index stats, info.json total_tasks=4, stats.json, README updated.
Recompute global frame index and per-episode index stats (episodes 0-76)
Episodes 62-76 carried an `index` column offset by -160 (160 duplicated values); per-episode stats for index/episode_index/task_index were stale for episodes 10-61. Rewrote data/chunk-000/file-001 and file-002 index column as dataset_from_index + frame_index (now unique 0..89121), recomputed those stats in meta/episodes file-000..002 and meta/stats.json. Episode numbering, lengths, tasks, videos and sensors unchanged, so sotac's source_raw_episode mapping is unaffected.
Append 100 episodes (77-176) contributed by Jingming Zhang from xlabcmu/sotac_contrib_20260901
Pure append: episodes 0-76 and all existing files untouched. New data/chunk-000/file-003.parquet, meta/episodes/chunk-000/file-003.parquet, video files top 004-006 and wrist 005-008, sensors/paxini_fingertip/episode_000077..000176, updated info.json/stats.json/tasks.parquet/README.
