Decide how to respond to changes to profiles and keys (jade_new_profile)

[Arnaz87]

Right now it's responding 200 when a profile already exists, even though it's not changing anything.

[naturallymitchell]

return 403?
https://github.com/foundpatterns/lighttouch-keys/blob/1a3195788efeb24bf522822a4ace81c83ad17f40/actions/jade_new_profile.lua#L34-L39