repair legacy root parquet sidecar notice

repair legacy root parquet notice

add legacy root parquet notice

mark legacy root parquet and canonical corrected splits

etl cache from preset baseline_v1: etl_cache_manifest.json

etl cache from preset baseline_v1: classes.json

etl cache from preset baseline_v1: registry.csv

etl cache from preset baseline_v1: tensors.lmdb

Add files using upload-large-folder tool

Add files using upload-large-folder tool

Upload te_seqdata.parquet with huggingface_hub

Upload README.md

initial commit