Added 27,076 deduplicated rows for nvfp4_group_gemm (leaderboard 730)
with both B200 and NVIDIA runner submissions. Updated README, docs,
and queries.sql to reflect the new problem.
- Add nvidia_nvfp4_submissions.parquet (~1.4GB) with 197,594 deduplicated submissions
- Includes nvfp4_gemv (35,559), nvfp4_gemm (48,682), nvfp4_dual_gemm (113,353)
- All submissions include full code content
- Add docs.md with data processing documentation
- Add queries.sql with SQL queries for data extraction
- Add scripts/nvfp4/ with helper scripts for analysis
- Update README.md with NVIDIA data documentation
