Give the agent a short hostname

assistant-agent.sttlab.local and its two siblings were long, and two of them
were French where nothing else in the estate is.

The Kubernetes object names are unchanged — they name a Deployment and a
Service, and nobody types them.

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

deploy/agents/ingress.yaml

@@ -32,7 +32,7 @@ metadata:
 spec:
   secretName: approvisionnement-agent-tls
   dnsNames:
-    - approvisionnement-agent.sttlab.local
+    - supply.sttlab.local
   issuerRef:
     name: sttlab-local-ca
     kind: ClusterIssuer
@@ -55,10 +55,10 @@ spec:
   ingressClassName: nginx
   tls:
     - hosts:
-        - approvisionnement-agent.sttlab.local
+        - supply.sttlab.local
       secretName: approvisionnement-agent-tls
   rules:
-    - host: approvisionnement-agent.sttlab.local
+    - host: supply.sttlab.local
       http:
         paths:
           - path: /