Changes to List Phone Numbers

added the optional property items/is_staff_transfer to the response with the 200 status

added the optional property items/bounce_back_intake_squad_id to the response with the 200 status

added the optional property items/outbound_squad_id_es to the response with the 200 status

removed the optional property items/call_transport from the response with the 200 status

the agent_platform response's property default value changed from pipecat to vapi for the status 200