Proper craftsmanship to mount Wi-Fi AP and ethernet cable to ceiling?
This is a very short answer but I'd just use the mounting disc that comes with the AP, drill a small hole in the ceiling and put a plug on the cable and you're done.  The instructions for the AP show how to mount it but it's really just a matter of three screws and drywall anchors and when mounted no cable visible.  Look at the disc and you'll see where the hole needs to be.