Changes to POST /v1/admin/channels

added the new optional request property responsesWebsocketEnabled

added the optional property channel/responsesWebsocketEnabled to the response with the 200 status

added the new optional request property forwardCancelSignal

added the optional property channel/forwardCancelSignal to the response with the 200 status

added the optional property channel/boundSources to the response with the 200 status