Changes to A/B test experiment results

added the optional property confidence_interval to the response with the 200 status

added the optional property control to the response with the 200 status

added the optional property delta_pp to the response with the 200 status

added the optional property evaluation_margin to the response with the 200 status

added the optional property experiment_id to the response with the 200 status

added the optional property merchant_id to the response with the 200 status

added the optional property min_sample_size to the response with the 200 status

added the optional property net_delta_bps to the response with the 200 status

added the optional property p_value to the response with the 200 status

added the optional property variant to the response with the 200 status

added the optional property verdict to the response with the 200 status

endpoint added