update items
Write metadata onto existing items: name, description, tags, field values and lineage. Applied item by item: a failure comes back in failed beside the results of the rest, and set names what changed. fields sets the workspace’s typed fields by name; an unknown name is an error, not a new field (organize_items create_fields makes one). made_from is derivation, this item made from that one; peers of one concept are a variation set (organize_items group_variations). Free.
Authorizations
An API key (es_live_…) from Settings, under API keys, or an OAuth access token.
Headers
Retry a paid dispatch safely: the same key returns the job already dispatched instead of charging again.
The workspace this one call acts in, when it is not the key's own.

