Catalogue Updated

Sent BY Ewity TO your app's registered webhook endpoint(s). The
path on this page exists only for docs grouping. Identify the event
by the X-Ewity-Event header.

Fires when one or more catalogue items at one or more of the
install's online locations may have changed — stock crossing in/out
of "in stock", storefront toggles, bulk imports. The event is
uniform across causes: data.items is a list of
(online_location_id, product_id, variant_id) triples; re-fetch via
the catalogue lookup endpoint to learn the new state. Changes that
pile up between deliveries are coalesced into one webhook with a
longer items array.

Envelope twin of the legacy CatalogueUpdated event. The same
payload may be delivered more than once — the lookup-and-upsert
pattern is naturally idempotent.