Immutable-once-set. Retry with same body returns 409 with current state.
Use /pickup/revoke to explicitly reverse.
OAuth 2.0 client_credentials grant via Keycloak service account.
Clients are provisioned per IntegrationOrganization in the
nt24-idp realm.
Client-generated unique key (UUID recommended) for this write operation.
Identical key + identical body within 24h returns the cached response.
Identical key + different body returns 422.
1 - 255UUID of the seller trade partner (must be in caller's authorized list).