Update dashboard manifests and add automation

- Updated deployment with correct Pi 3 tolerations
- Updated ingress for cloudflare-tunnel
- Added crontab example for systemd alternative
- Updated go.sum

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

dashboard/deploy/deployment.yaml

@@ -18,12 +18,12 @@ spec:
     spec:
       # Target Pi 3 node (lightweight workload)
       tolerations:
-        - key: "node-type"
+        - key: "capacity"
           operator: "Equal"
-          value: "pi3"
-          effect: "NoSchedule"
+          value: "low"
+          effect: "NoExecute"
       nodeSelector:
-        kubernetes.io/arch: arm64
+        kubernetes.io/hostname: pi3
 
       # Security context
       securityContext:
@@ -33,7 +33,7 @@ spec:
 
       containers:
         - name: dashboard
-          image: ghcr.io/will/k8s-agent-dashboard:latest
+          image: gitea-http.taildb3494.ts.net/will/k8s-agent-dashboard:latest
           imagePullPolicy: Always
           ports:
             - name: http