Office1 OPNsense edge build: real-ISP-router config + first-boot fixes ...

Bringing the Office1 OPNsense edge online (router + DHCP for office1-local)
before the Office1 NetBox VM. First-ever OPNsense boot in this repo; several
first-execution findings fixed.

DOCFIX-184: opnsense-prep-image.sh decompresses the .img.bz2 via python3's
stdlib bz2 when bunzip2 is absent (no sudo install needed). Harness 3/3.

DOCFIX-185: the OPNsense edge is a normal simulated-ISP router, not an
egress-airgap. Operator clarified the transport model -- each site (DCs +
Office) has its own real ISP connection; dark fiber is East-West/replication
only; D-107 node-airgap is a separate DC concern. Stripped the WAN
egress-control rules (seq 20/21/99) + MIRROR_* tokens from the config template,
render script, and harness (8/8). Flagged a D-100/D-107 amendment note as
follow-up.

DOCFIX-186: instantiate module "office1_opnsense" in main.tf (first real
validation of modules/opnsense-edge). Two infra findings: (1) config_iso_path
must be OUTSIDE the pool dir (create.content.url collides with its own target
volume) -> stage the ISO; (2) apparmor blocks the custom /var/lib/libvirt/vr1/
pool path (foundational -- all VR1 VMs) -> needs a one-time local apparmor rule
(operator sudo). office1-wan NAT network created via virsh (D-103 debt).

repo-lint 0 fail; opnsense-prep-image 3/3; opnsense-render-config 8/8.
Boot blocked only on the apparmor fix (pending operator sudo).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

DOCFIX-149: OPNsense config.xml template + tested renderer ...

Real design work, researched before drafting: fetched OPNsense's own actual
shipped config.xml.sample and its Route.xml static-routes model before
writing anything.

opentofu/templates/opnsense-config.xml.tmpl: {{TOKEN}}-parameterized (reuses
this repo's existing clientdocs convention), covering interfaces/gateway/
staticroutes/DNS/NTP and D-107-shaped firewall rules (default-deny WAN
egress except NTP + the per-DC mirror's upstream sync). The real sample
fetch directly confirmed last turn's audit finding with an actual example:
it ships literal placeholder device names inside each interface's own <if>
block, proving LAN/WAN role assignment really is that explicit per-block
mapping, not declaration order.

scripts/opnsense-render-config.sh: the renderer. Needs no external tool
(unlike every other opnsense-* script this session), so it's tested
END-TO-END, not just guard clauses -- 8/8, including well-formed-XML
validation. The harness caught a real bug before it shipped: the token
HOSTNAME collides with bash's own built-in $HOSTNAME variable (unset
doesn't actually clear it), silently passing a test that should have
failed. Renamed to OPNSENSE_HOSTNAME throughout.

opentofu/templates/README.md's token legend marks exactly which values are
real (NTP pool default, D-106 naming) vs. pending Stage 0 ratification
(D-100/D-101/D-107) vs. only measurable on a real boot (vtnetN assignment)
vs. a security requirement (root password hash must be freshly generated,
never the stock sample's own shipped default).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QrcJx8TUar7pYAvpGJw57A