spatial interaction z scores

[YuanningEric]

Thanks for creating this awesome package! For generating the spatial interaction scores, why not returning the z scores calculated from the permutation analysis, but the frequencies of cellular interactions?

https://github.com/labsyspharm/scimap/blob/7082470dc5233747efb06797721289c813c0c734/scimap/tools/spatial_interaction.py#L206C1-L207C45