Add tokenized AutoMathText-V2 (commit every 100k seqs) [automathtext-v2-ultra] (+106,496 seqs)

data/train-automathtext-v2-ultra-000005.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:94171d68a592b021ef606834fce7de0450aea1a1e29f3e9b8c465af5bedfb18a
+size 771691583

progress/train-automathtext-v2-ultra.json

@@ -1 +1 @@
-{"committed_seqs": 532480, "next_shard": 5, "seq_len": 4089, "parquet_shard_seqs": 100000, "updated_unix": 1769396261}
+{"committed_seqs": 638976, "next_shard": 6, "seq_len": 4089, "parquet_shard_seqs": 100000, "updated_unix": 1769397326}