Upload v2/mathlib_nodes_enriched.csv with huggingface_hub

Add Lean mechanism extraction data (typeclasses, attributes, coercions, etc.)

Add per-declaration tactic usage data (235,586 declarations, extracted via jixia)

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Upload mathlib_nodes.csv with huggingface_hub

Upload edges.csv with huggingface_hub

Upload nodes.csv with huggingface_hub

initial commit