Placing QR and NFC stickers on machines

1. Add the machine in Equipment, with its serial number and warranty if you have them.
2. Get its sticker. Each machine has its own code for a QR sticker and an NFC sticker.
3. Place it where people can reach it, at about chest height, away from moving parts and places that get wiped hard.
4. Test it with a phone. The scan should open that machine's page.

When members scan, they can log a workout on that machine or report a problem. When staff scan it on an inspection round, they run that machine's checklist.