Add felhom-hub: multi-customer dashboard service

- Hub service receives reports from customer controllers
- SQLite store with 90-day retention and auto-prune
- REST API: POST /api/v1/report, GET /api/v1/customers
- Dark theme dashboard with status overview table
- Customer detail page with system, storage, containers, backup, health
- Bearer token auth for report ingest, bcrypt auth for dashboard
- K8s manifest for felhom-system namespace (Deployment, Service, Ingress, PVC)
- Dockerfile with multi-stage build

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

manifests/hub.yaml

@@ -0,0 +1,133 @@
+# Felhom Hub — Multi-customer dashboard
+# Dashboard: https://hub.felhom.eu
+# API: POST /api/v1/report (Bearer token auth)
+#
+# Receives health reports from customer controllers and displays
+# a centralized overview dashboard for the operator (Viktor).
+#
+# Namespace: felhom-system (shared with healthchecks and other felhom infra)
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: hub-data
+  namespace: felhom-system
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: 1Gi
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: hub-config
+  namespace: felhom-system
+data:
+  hub.yaml: |
+    auth:
+      password_hash: ""
+    api:
+      report_api_key: ""
+    retention:
+      max_days: 90
+      prune_schedule: "04:30"
+    alerting:
+      stale_threshold: "30m"
+    server:
+      listen: ":8080"
+      data_dir: "/data"
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: hub
+  namespace: felhom-system
+  labels:
+    app: hub
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: hub
+  template:
+    metadata:
+      labels:
+        app: hub
+    spec:
+      containers:
+        - name: hub
+          image: gitea.dooplex.hu/admin/felhom-hub:latest
+          ports:
+            - containerPort: 8080
+          resources:
+            requests:
+              memory: "64Mi"
+              cpu: "50m"
+            limits:
+              memory: "256Mi"
+              cpu: "500m"
+          volumeMounts:
+            - name: data
+              mountPath: /data
+            - name: config
+              mountPath: /etc/felhom-hub
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 5
+            periodSeconds: 30
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 3
+            periodSeconds: 10
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: hub-data
+        - name: config
+          configMap:
+            name: hub-config
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: hub
+  namespace: felhom-system
+spec:
+  selector:
+    app: hub
+  ports:
+    - port: 8080
+      targetPort: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: hub
+  namespace: felhom-system
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    nginx.ingress.kubernetes.io/proxy-body-size: "2m"
+spec:
+  ingressClassName: nginx-internal
+  tls:
+    - hosts:
+        - hub.felhom.eu
+      secretName: hub-felhom-eu-tls
+  rules:
+    - host: hub.felhom.eu
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: hub
+                port:
+                  number: 8080