normalize task_index: data/chunk-000/file-000.parquet

fix task_index offset and metadata

fix task_index shift: data/chunk-000/file-000.parquet

Cleanup orphan parquet files (99 files)

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normalize: cleanup tmp files

normalize: write canonical 0-based files

normalize: delete shifted files

normalize: copy shifted files to tmp

restore missing shifted file-100

Cleanup orphan parquet files (1 files)

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Delete files data/chunk*/episode_* meta/*.jsonl videos/chunk* with huggingface_hub

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