feat(cloudflared): add Cloudflare Tunnel deployment (token-based, cfddns-style)

cloudflared/k8s/.gitignore

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+secret.yaml

cloudflared/k8s/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: cloudflared
+  labels:
+    app: cloudflared
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: cloudflared
+  template:
+    metadata:
+      labels:
+        app: cloudflared
+    spec:
+      containers:
+        - name: cloudflared
+          image: cloudflare/cloudflared:2026.1.1
+          imagePullPolicy: IfNotPresent
+          args:
+            - tunnel
+            - --no-autoupdate
+            - run
+          env:
+            - name: TUNNEL_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: cloudflared-secrets
+                  key: TUNNEL_TOKEN
+          resources:
+            requests:
+              memory: "32Mi"
+              cpu: "30m"
+            limits:
+              memory: "128Mi"
+              cpu: "200m"
+          livenessProbe:
+            exec:
+              command:
+                - cloudflared
+                - --version
+            initialDelaySeconds: 30
+            periodSeconds: 60

cloudflared/k8s/secret.yaml.example

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: cloudflared-secrets
+type: Opaque
+stringData:
+  TUNNEL_TOKEN: your_tunnel_token_here