Changes to List verified vendors

added the optional property data/items/catalog_api_id to the response with the 200 status

added the optional property data/items/registration_id to the response with the 200 status

added the required property data/items/entry_id to the response with the 200 status

added the required property data/items/name to the response with the 200 status

added the required property data/items/source to the response with the 200 status

endpoint added