Expand spine store to 12 datasets (add SWE-Hero, Nemotron-SFT-OpenCode-v1, Nemotron-SFT-SWE-v3, Kwai-Klear SWE-smith-66k); 220021 rows

Expand spine store to 8 datasets (add Nemotron-SFT-Agentic-v2, SWE-ZERO-12M, JierunChen); 140021 rows

Upload procgrep_spines.parquet with huggingface_hub

Upload procgrep_spines.parquet with huggingface_hub

Upload procgrep_spines.parquet with huggingface_hub

initial commit