Follow the AI gateway Kustomization into the llm namespace

dependsOn still named flux-system, where it used to live. Flux reports
"dependency not found" and holds this Kustomization not ready rather than
failing loudly, so the Kong configuration silently stopped reconciling.

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

dev/proxy-kustomization.yaml

@@ -12,7 +12,10 @@ spec:
   prune: true
   dependsOn:
     - name: llm-dev-ai-gateway
-      namespace: flux-system
+      # The AI gateway Kustomization moved out of flux-system into this
+      # namespace. A dependsOn still naming flux-system resolves to nothing
+      # and holds this Kustomization not ready rather than failing loudly.
+      namespace: llm
   postBuild:
     substitute:
       NAME: llm-dev