Add K3s dev deployment setup for single-node VPS

Mirrors the prod deploy-k3s/ setup but runs all services in-cluster
on a single node: PostgreSQL (replaces Neon), MinIO S3-compatible
storage (replaces B2), Redis, API, worker, and admin.

Includes fully automated setup scripts (00-init through 04-verify),
server hardening (SSH, fail2ban, ufw), Let's Encrypt TLS via Traefik,
network policies, RBAC, and security contexts matching prod.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy-k3s-dev/manifests/redis/deployment.yaml

@@ -0,0 +1,105 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: redis
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: redis
+    app.kubernetes.io/part-of: honeydue
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate  # ReadWriteOnce PVC — can't attach to two pods
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: redis
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: redis
+        app.kubernetes.io/part-of: honeydue
+    spec:
+      serviceAccountName: redis
+      # No nodeSelector — single node dev cluster
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 999
+        runAsGroup: 999
+        fsGroup: 999
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: redis
+          image: redis:7-alpine
+          command:
+            - sh
+            - -c
+            - |
+              ARGS="--appendonly yes --appendfsync everysec --maxmemory 256mb --maxmemory-policy noeviction"
+              if [ -n "$REDIS_PASSWORD" ]; then
+                ARGS="$ARGS --requirepass $REDIS_PASSWORD"
+              fi
+              exec redis-server $ARGS
+          ports:
+            - containerPort: 6379
+              protocol: TCP
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            capabilities:
+              drop: ["ALL"]
+          env:
+            - name: REDIS_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: honeydue-secrets
+                  key: REDIS_PASSWORD
+                  optional: true
+          volumeMounts:
+            - name: redis-data
+              mountPath: /data
+            - name: tmp
+              mountPath: /tmp
+          resources:
+            requests:
+              cpu: 50m
+              memory: 64Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+          readinessProbe:
+            exec:
+              command:
+                - sh
+                - -c
+                - |
+                  if [ -n "$REDIS_PASSWORD" ]; then
+                    redis-cli -a "$REDIS_PASSWORD" ping 2>/dev/null | grep -q PONG
+                  else
+                    redis-cli ping | grep -q PONG
+                  fi
+            initialDelaySeconds: 5
+            periodSeconds: 10
+            timeoutSeconds: 5
+          livenessProbe:
+            exec:
+              command:
+                - sh
+                - -c
+                - |
+                  if [ -n "$REDIS_PASSWORD" ]; then
+                    redis-cli -a "$REDIS_PASSWORD" ping 2>/dev/null | grep -q PONG
+                  else
+                    redis-cli ping | grep -q PONG
+                  fi
+            initialDelaySeconds: 15
+            periodSeconds: 20
+            timeoutSeconds: 5
+      volumes:
+        - name: redis-data
+          persistentVolumeClaim:
+            claimName: redis-data
+        - name: tmp
+          emptyDir:
+            medium: Memory
+            sizeLimit: 64Mi

deploy-k3s-dev/manifests/redis/pvc.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: redis-data
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: redis
+    app.kubernetes.io/part-of: honeydue
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 5Gi

deploy-k3s-dev/manifests/redis/service.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: redis
+    app.kubernetes.io/part-of: honeydue
+spec:
+  type: ClusterIP
+  selector:
+    app.kubernetes.io/name: redis
+  ports:
+    - port: 6379
+      targetPort: 6379
+      protocol: TCP