Re-scanning a node after a LAN renumber updated the FIPS peer (npub-
matched) but duplicated the saved-server entry (address-matched).
ServerEntry now carries the node's fnpub as a trailing serialization
field (legacy entries still parse) and every saved/active-entry match
goes through sameNode: npub identity first, address/port/scheme only as
the LAN-only fallback. Edit forms that don't carry the npub keep the
stored one.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>