Link the arXiv preprint (arXiv:2608.26737)

Card: keep the whole YAML block inside the head -20 verification window

Add dataset card (README.md) and CC BY-NC-SA 4.0 LICENSE

add synthetic_pool_57K.tar.gz - free mirror of the IEEE DataPort deposit doi:10.21227/nqgf-9k39

add synthetic_pool_31K.tar.gz - free mirror of the IEEE DataPort deposit doi:10.21227/nqgf-9k39

initial commit