fix(playout): properly populate scheduled_now_webstream
fix(playout): properly populate scheduled_now_webstream

If scheduled_now_webstream is an empty array, the webstream will automatically be stopped, so we need to make sure the scheduled_now_webstream is aways properly populated.

LibreTime/libretime,LibreTime/libretime,LibreTime/libretime,LibreTime/libretime,LibreTime/libretime,LibreTime/libretime