feat: deploy the Approvisionnement facade

The adapter runs in the agents namespace with the other agents, not with n8n:
what it is, is an agent, and the workflow behind it is an implementation detail
its callers never see.

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

deploy/agent-facades-kustomization.yaml

@@ -0,0 +1,17 @@
+# The agent facades, in the agents namespace. Separate from the n8n
+# Kustomization because they are a different thing in a different namespace,
+# with a different reason to change.
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: agent-facades
+  namespace: n8n
+spec:
+  interval: 10m
+  sourceRef:
+    kind: GitRepository
+    name: agent-flows
+  path: ./deploy/agents
+  prune: true
+  wait: true
+  timeout: 3m