Tighten the Goss firewall assertion and render it from the declaration

The conformance checker existed but had not run since 2026-03-09, and its
firewall assertion matched /6443\/tcp.*ALLOW/ - asserting the port was allowed
but not from whom. It passed identically whether the API was restricted to one
operator address or open to the entire internet, which is precisely the drift
that went undetected.

goss/baseline.yaml is now a template rendered per host from the same inventory
declaration that converges the host, so the assertion cannot drift from what it
checks. It asserts each declared source is present, that no revoked source
retains access, and that 6443 is never ALLOW Anywhere. verify.yaml gained the
vars_files the bootstrap play already had - without it the firewall assertions
rendered empty and silently asserted nothing, which is worse than no check.

Result on Railiance01: 32 assertions, 31 pass. The one failure is a real find
and is recorded as T06 - Flannel VXLAN is declared open to Anywhere with no
source restriction, the same defect pattern as the k3s rule. It is currently
absent from the host, so converging would INTRODUCE the exposure rather than
fix drift. Must be resolved before RAIL-BS-WP-0007 multi-node HA needs working
VXLAN.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

ansible/playbooks/verify.yaml

@@ -9,5 +9,9 @@
 - hosts: all
   become: true
   gather_facts: true
+  # Same declaration the bootstrap play converges from. Without this the
+  # firewall assertions render empty and silently assert nothing.
+  vars_files:
+    - ../inventory/group_vars/all.yaml
   roles:
     - role: goss

ansible/roles/goss/tasks/main.yml

@@ -24,9 +24,9 @@
     checksum: "sha256:https://github.com/goss-org/goss/releases/download/v{{ goss_version }}/goss-linux-amd64.sha256"
   register: goss_download
 
-- name: Copy baseline test file
-  ansible.builtin.copy:
-    src: "{{ playbook_dir }}/../../goss/baseline.yaml"
+- name: Render baseline test file from the same declaration that converges the host
+  ansible.builtin.template:
+    src: "{{ playbook_dir }}/../../goss/baseline.yaml.j2"
     dest: "{{ goss_dir }}/baseline.yaml"
     owner: root
     group: root