This skill turns a raw catalog export into data fit for import into a new store, into a PIM or into feed generation. It does so reversibly and auditably: the original stays untouched, every change lands in a change log, and anything that cannot be established from the data gets the status `MISSING` instead of an invented value. The skill is built for large multichannel catalogs, where the same product has to look consistent both in the owned store and on marketplaces.
