feat(appliance): show egress MAC on the console banner#532
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The console banner already lists Web UI / Host mgmt / Hostname; add the egress interface's MAC so an operator can set a DHCP reservation (pin the appliance to a stable IP) straight from the console — no SSH, no hunting through 'ip link'. That reservation is the prerequisite for a public DNS A-record + TLS hostname (ADR-105). Adds egress_iface()/egress_mac() helpers mirroring primary_ip().
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What
Add the egress interface's MAC address to the console-TUI banner, next to Web UI / Host mgmt / Hostname.
Why
To pin the appliance to a stable LAN IP you set a DHCP reservation, which needs the NIC's MAC. Surfacing it on the console (no SSH, no
ip linkhunting) makes that a self-service step — and the reservation is the prerequisite for a public DNS A-record + TLS hostname (ADR-105). Came straight out of dogfooding the zero-config appliance boot: the first thing you want after it grabs a DHCP lease is its MAC, to pin it.How
egress_iface()/egress_mac()helpers (mirroringprimary_ip()—ip route get 1.1.1.1, then/sys/class/net/<if>/address); one banner line. Degrades to(unknown)if offline.