GET /v1/catalog/shipping-services returns the published V1 shipping choices
for automation forms. It is public and cacheable for five minutes.
The response is discovery data, not a quote. Copy the selected service into
the order, then quote the full order. The quote decides whether that service is
available for the destination and freezes the final amount.
Published choices
standard_one_day and priority_one_day remain valid order values, but the
catalog does not publish them yet. Do not present them as generally available
automation choices.
Refresh on every run
Store the returnedshipping_catalog_revision with a saved workflow setting.
Reload the catalog when the workflow runs. If the saved service or revision is
gone, ask the user to choose again rather than guessing a replacement.