Construct the sex-check analysis module descriptor
Source:R/module_sex_check_registry.R
sex_check_module_spec.RdGenetic sex inference from X-chromosome heterozygosity (Visscher et al. 2010's F-statistic) and Y-chromosome genotype call rate (males have a Y to call genotypes from, females do not), PLINK's `–check-sex` convention extended to use both complementary signals, plus mismatch detection against a supplied `sex` metadata column. When both signals are available and confidently disagree, the combined call is `discordant` – informative evidence of a data problem, not averaged away. VCF-only: runs from genotypes alone and requires no population or geographic metadata. Skips transparently (no table, no figure) only when the analyzed VCF has too few QC-passing SNPs on *both* chromosomes; either signal alone is used when only one chromosome is present.