feat(export): add nifti, csv, and parquet export modules#183
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Round-trip export from fd5 back to standard formats: - fd5 export nifti: recon/ndarray → .nii.gz (via nibabel) - fd5 export csv: tabular/spectrum/timeseries → .csv - fd5 export parquet: tabular/timeseries → .parquet (via pyarrow) - Shared extract_columns() helper to avoid duplication - Lazy imports for optional deps with helpful error messages Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
src/fd5/export/module with nifti, csv, parquet exportersfd5 export nifti,fd5 export csv,fd5 export parquetextract_columns()helper for csv/parquet deduplicationTest plan
uv run pytest tests/test_export_nifti.py tests/test_export_csv.py tests/test_export_parquet.py -x🤖 Generated with Claude Code