Reject POST/PATCH /api/users before mutating when peer grant or strategy
assignment DB methods are absent; return refreshed scope on PATCH; warn
on unknown peerIds; add facade parity and scope regression tests.
Refs #380
Thanks: INSOLVE (Honorary); Marco Jakobs (@jacotec); MyNameisStitch (@MyNameisStitch); Redspin (@playerumpknow)
Add folder/direct-device/strategy assignment from User Management, clearer Pro vs Remote Operator labeling, optional restricted device scope mode, and Go/Node scope parity.