Return the live options for a facet declared by a resource.
Replaces per-connector endpoints (e.g. /email/labels) with a single shape:
the resource declares its facets in BaseResource.facets and implements
list_facets to fetch the option set from the provider.
Documentation Index
Fetch the complete documentation index at: https://docs.beta.adapter.com/llms.txt
Use this file to discover all available pages before exploring further.