Returns the allowed values for one or more fields in a dataset, for use as filter values when querying data via "Get Data from Dataset (v2)". Pass field names in the fields array of the request body; the response is an object keyed by field name, where each value is an array of {id, value} option objects. Optionally supply filters to narrow the returned options (e.g. only options that exist for active employees) and dependentFields when one field's options depend on another field's selected value. Use "Get Fields from Dataset (v1.2)" to discover valid field names for a dataset.

Note: Compared to "Get Field Options (v1)", error responses (400, 403) use RFC 7807 application/problem+json format. Unrecognised field names may produce a 500 response with a plain-text body rather than structured JSON.