feat(traefik): register traefik in manifest-driven secrets provisioning

secrets/secrets-map.yaml

@@ -1,4 +1,4 @@
-# ─────────────────────────────────────────────────────────────────────────────
+# ─────────────────────────────────────────────────────────────────────────
 # secrets-map.yaml — DATA-ONLY manifest for deploy/provision-stack.py
 #
 # RULES:
@@ -27,7 +27,7 @@
 #
 # Stacks not listed here fall through to deploy.yml's legacy case-entries
 # untouched. Migration is deliberately one stack per PR.
-# ─────────────────────────────────────────────────────────────────────────────
+# ─────────────────────────────────────────────────────────────────────────
 stacks:
   ai:
     env_template: ai/ai.env.template
@@ -36,3 +36,6 @@ stacks:
       flowagent_azure_client_id: FLOWAGENT_AZURE_CLIENT_ID
       flowagent_azure_tenant_id: FLOWAGENT_AZURE_TENANT_ID
       flowagent_azure_client_secret: FLOWAGENT_AZURE_CLIENT_SECRET
+  traefik:
+    env_template: traefik/traefik.env.template
+    env_dest: traefik/traefik.env