chore(guacamole): retire legacy guac.iamworkin.lan IngressRoute+cert

Single-host routing via desktop.iamworkin.lan/guacamole has been
live-proven (curl → 200) and the Codex single-host-guacamole-wip
merge flipped RemoteDesktop.Web's GuacamolePublicUrl + defaults to
the new path. Nothing else in FlowerCore actively requires the
legacy guac.iamworkin.lan URL.

Removed from the guacamole app:
- IngressRoute `guacamole` matching Host(guac.iamworkin.lan)
- Middleware `guac-add-prefix` (only the legacy route referenced it)
- Certificate `guacamole-tls` (only covered guac.iamworkin.lan)

ArgoCD prune will delete the live resources on next sync. The
pfSense DNS override for guac.iamworkin.lan should be removed
via FlowerCore.DNS as a follow-up operator step — not managed by
this repo.

The new `guacamole-desktop-path` IngressRoute + `desktop-guacamole-path-tls`
Certificate (added in e65de29) handle all Guacamole traffic going
forward.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/guacamole/guacamole.yaml

@@ -399,50 +399,13 @@ spec:
       targetPort: 8080
       name: http
 ---
-# Traefik addPrefix middleware
-# External URL guac.iamworkin.lan/ gets prefix /guacamole added
-apiVersion: traefik.io/v1alpha1
-kind: Middleware
-metadata:
-  name: guac-add-prefix
-  namespace: guacamole
-spec:
-  addPrefix:
-    prefix: /guacamole
----
-# TLS Certificate via cert-manager
-apiVersion: cert-manager.io/v1
-kind: Certificate
-metadata:
-  name: guacamole-tls
-  namespace: guacamole
-spec:
-  secretName: guacamole-tls
-  issuerRef:
-    name: step-ca-acme
-    kind: ClusterIssuer
-  dnsNames:
-    - guac.iamworkin.lan
----
-# Traefik IngressRoute
-apiVersion: traefik.io/v1alpha1
-kind: IngressRoute
-metadata:
-  name: guacamole
-  namespace: guacamole
-spec:
-  entryPoints:
-    - websecure
-  routes:
-    - match: Host(`guac.iamworkin.lan`)
-      kind: Rule
-      middlewares:
-        - name: guac-add-prefix
-      services:
-        - name: guacamole
-          port: 8080
-  tls:
-    secretName: guacamole-tls
+# Legacy guac.iamworkin.lan IngressRoute + add-prefix middleware +
+# TLS Certificate RETIRED 2026-04-24. Single-host routing via
+# desktop.iamworkin.lan/guacamole (below) has been live-proven and
+# RemoteDesktop.Web no longer emits URLs pointing at the legacy
+# subdomain. ArgoCD prune will delete the live resources on next
+# sync; pfSense DNS override for guac.iamworkin.lan should be
+# removed via FlowerCore.DNS in a follow-up operator step.
 ---
 # Single-host Guacamole routing — matches RemoteDesktop.Web launch URLs
 # that embed Guacamole as a path-prefixed iframe on the primary desktop