DOCFIX-193 APPLIED: the Office1 edge now serves DHCP (kea-dhcp4 on udp/67) ...

Executed the live apply that DOCFIX-193 deliberately left pending. Measured end state
on root@10.10.0.1 after reboot: kea-dhcp4 running, bound udp4 10.10.0.1:67, subnet
10.10.0.0/24, pool .100-.199, routers/DNS 10.10.0.1. Router unaffected -- WAN 172.30.1.2,
LAN 10.10.0.1, default route 172.30.1.1, NAT automatic, egress 1.1.1.1 at 0.0% loss,
serial console + getty alive (DOCFIX-192 holds).

Path: render -> scp -> SHA-256 verify on guest (matched) -> install /conf/config.xml ->
reboot. Edge back in ~30s.

The finding that nearly bit us: a full-config push drops ~667 migration-populated
elements, including the ONLY 2 pass rules on the box ("Default allow LAN to any" + IPv6 --
legacy /filter/rule count is 0 in 26.1) against a pf base policy of block-drop-all.
Dropping them = an edge that boots but does not route. Settled NOT by inference but from
the box's own /conf/backup/ trail: three prior pushes of a rule-less config each came back
with both rules regenerated by run_migrations. Post-apply re-confirms it -- 791 elements,
both LAN rules back, webgui TLS cert back, and our Kea subnet4 survived the migration.
The overwrite is self-healing; do not hand-merge to preserve them.

Defect logged, not fixed here: root's shell on OPNsense is tcsh, so the pre-install
snapshot step (a $(...) inside a quoted remote command) died with "Illegal variable name"
and silently no-op'd -- the install ran without its rollback point. Config was recoverable
via /conf/config.xml.prev + /conf/backup/, so no harm, but the guard was absent when
relied upon. Remote commands must be fed to sh -s. The apply path wants to become a
harnessed scripts/opnsense-apply-config.sh; LOGGED as an open gap, out of scope here.

Not verified end-to-end: no client has taken a lease (office1-local has no host yet).

Revert: ssh root@10.10.0.1 'sh -s' <<< 'cp /conf/config.xml.prev /conf/config.xml && reboot'

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B6Fzre1CxCY8tzwFCudu57