- Update test to unmarshal response object before extracting results array
- API returns {"results": [...], "total": N}, not a bare array
- Fixes "cannot unmarshal object into Go value of type []map" error
- Test now correctly handles the structured autocomplete response
The handleFieldValuesSearch endpoint returns a structured response
with metadata (results array + total count), not a bare array.
This aligns the test with the actual API response format.