Use temporal.coulomb.social for Temporal UI SSO host

Prefer clean short hostname temporal.coulomb.social instead of
activity-temporal.coulomb.social for Ingress, CORS, and ops UI links.

k8s/railiance/32-ingress-temporal-sso.yaml

@@ -1,5 +1,5 @@
 # HTTPS SSO front door for Temporal Web UI.
-# Requires DNS: activity-temporal.coulomb.social A → 92.205.62.239
+# Requires DNS: temporal.coulomb.social A → 92.205.62.239
 # ACTIVITY-WP-0025
 apiVersion: networking.k8s.io/v1
 kind: Ingress
@@ -19,10 +19,10 @@ spec:
   ingressClassName: traefik
   tls:
     - hosts:
-        - activity-temporal.coulomb.social
+        - temporal.coulomb.social
       secretName: actcore-temporal-ui-tls
   rules:
-    - host: activity-temporal.coulomb.social
+    - host: temporal.coulomb.social
       http:
         paths:
           - path: /