Generates Dicom.SOPClass from innolitics sops.json and service_sop_classes.exs.
Reads priv/sops.json (175 storage SOP classes from innolitics/dicom-standard)
and priv/service_sop_classes.exs (hand-maintained non-storage SOP classes),
derives modality from SOP name, marks retired UIDs, and generates a compile-time
registry module.
Usage
mix dicom.gen_sop_classes