The primary IP of each family is the management address, else the first
address on the management interface (the v6 address next to a v4
management address). DMI placeholders ("Not Specified", "To Be Filled
By O.E.M.") are not written as serials. rollcall ipam sync prints the
device report.
Refs #10
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>