Product categories in orders as JSON array
Product categories are now stored as a JSON array instead of a delimiter‑separated string (e.g. Alcohol|Wine|Red). In segmentation, entering just Wine is enough ‑ without needing to know the full category tree. Integrations have been updated: Shoptet now sends all categories (previously max. 1), Upgates all (previously max. 3), Webareal adds category transfer for the first time. Existing segments remain functional and can gradually be re‑saved in the new format. The API and tracking code accept both the new format and the original string ‑ backward compatibility is maintained.