alexion e05adef7b7 feat(network): add host VLAN-bridge networking foundation ...

Introduce `modules.network`, the host-level networking foundation a Host
declares once. A Host states its trunk interface and the tagged VLAN ids to
materialize, and the module emits one systemd-networkd bridge per VLAN, named
by the `br-vlan<id>` convention, plus the host's own management address on a
chosen VLAN's bridge.

The trunk and every bridge set `RequiredForOnline = "no"` so wait-online never
blocks boot on a carrier-less link, and the module owns its own NetworkManager
`unmanaged` guard so enabling it is self-sufficient. Two assertions tie the
management VLAN to the declared VLANs and a management address to a VLAN, so an
address can never be silently dropped.

No host commits an enablement: the only host is a wifi laptop that cannot
present guests as L2 citizens and whose DNS the module's networkd/resolved
would disturb, so the standing enablement waits for the first wired server
host. The build and bridge-name evaluation were verified by enabling the
module ad hoc, and stay reproducible through `extendModules`.

2026-07-25 16:18:10 -04:00

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