{ "source": "senedd-record-en", "created_at_utc": "2025-12-22T19:18:55Z", "num_shards": 1, "num_documents": 41, "format": "nanochat-parquet-v1", "text_column": "text", "row_group_size": 1024, "parquet": { "compression": "zstd", "compression_level": 3, "use_dictionary": false, "write_statistics": false }, "target_shard_bytes": 104857600, "initial_chars_per_shard": 250000000, "final_chars_per_shard_estimate": 250000000 }