Switch to data_dir with 36 configs + metadata.jsonl for NISQA columns

Remove non-working metadata.jsonl, keep only accents+languages (proven working)

Add metadata.jsonl with NISQA scores (dash in dir name was the real issue)

Remove metadata.jsonl files that break dataset viewer

Move metadata.jsonl into each subdirectory for dataset viewer column display

Add FLAC audio files with metadata.jsonl (NISQA scores)

Remove WAV files and old metadata.json before FLAC upload

Upload folder using huggingface_hub