OpenHAB2 cannot recognize Z-Wave Nodon Wall Switch CWS-3100

No, it is compiled into the binding. That is the reason why you are out of luck if you are on an old stable 2.3 release with newer devices.

Sure, read the first couple of posts in this thread:

Note that you need to upgrade only if manually waking up the device does not help (but according to Chris answer it should help)

Yes, that is the reason I provided the link to the database guide.