Add logviewer.unkin.net internal DNS record

logviewer.unkin.net does not resolve; the Gateway and certificate for it
already exist (from #404), so browsers cannot reach the UI. Add an A
record on the internal traefik gateway VIP, mirroring the existing
ghp/identity records.

- Add DNSRecord logviewer-dns-internal (A, ttl 600, 198.18.200.4) to
  bind-internal authoritative records

apps/base/bind-internal/authoritative/records.yaml

@@ -117,3 +117,18 @@ spec:
     # traefik-EXTERNAL (DMZ) gateway VIP; the arrproxy Gateway serves the
     # arrstack.unkin.net front door (oauth2-proxy) there.
     - 198.18.199.0
+---
+apiVersion: bind.unkin.net/v1alpha1
+kind: DNSRecord
+metadata:
+  name: logviewer-dns-internal
+  namespace: bind-internal
+spec:
+  zoneRef: unkin-net
+  name: logviewer
+  type: A
+  ttl: 600
+  values:
+    # traefik-internal gateway VIP; the logviewer Gateway serves
+    # logviewer.unkin.net there.
+    - 198.18.200.4