build: backup traefik HelmChartConfig from k3s master manifests

Snapshot of /var/lib/rancher/k3s/server/manifests/traefik-config.yaml
on turing1 after dropping the v2 image pin during the Traefik v3
migration. Lives only on the node otherwise — track it here so it can
be restored on a node rebuild.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

cluster_setup/traefik-config.yaml

@@ -0,0 +1,37 @@
+apiVersion: helm.cattle.io/v1
+kind: HelmChartConfig
+metadata:
+  name: traefik
+  namespace: kube-system
+spec:
+  valuesContent: |-
+    logs:
+      access:
+        enabled: true
+        format: common
+    # opcional: para logs de Traefik (no sólo access logs)
+    log:
+      level: INFO
+      format: json
+    # esto ya estaba, pero si querés mantenerlo:
+    deployment:
+      podAnnotations:
+        prometheus.io/port: "8082"
+        prometheus.io/scrape: "true"
+    providers:
+      kubernetesIngress:
+        publishedService:
+          enabled: true
+    priorityClassName: "system-cluster-critical"
+    tolerations:
+    - key: "CriticalAddonsOnly"
+      operator: "Exists"
+    - key: "node-role.kubernetes.io/control-plane"
+      operator: "Exists"
+      effect: "NoSchedule"
+    - key: "node-role.kubernetes.io/master"
+      operator: "Exists"
+      effect: "NoSchedule"
+    service:
+      ipFamilyPolicy: "PreferDualStack"
+