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/postgres/deployment.yaml

@@ -0,0 +1,93 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: postgres
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: postgres
+    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: postgres
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: postgres
+        app.kubernetes.io/part-of: honeydue
+    spec:
+      serviceAccountName: postgres
+      # Note: postgres image entrypoint requires root initially to set up
+      # permissions, then drops to the postgres user. runAsNonRoot is not set
+      # here because of this requirement. This differs from prod which uses
+      # managed Neon PostgreSQL (no container to secure).
+      securityContext:
+        fsGroup: 999
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: postgres
+          image: postgres:17-alpine
+          ports:
+            - containerPort: 5432
+              protocol: TCP
+          securityContext:
+            allowPrivilegeEscalation: false
+            capabilities:
+              drop: ["ALL"]
+          env:
+            - name: POSTGRES_DB
+              valueFrom:
+                configMapKeyRef:
+                  name: honeydue-config
+                  key: POSTGRES_DB
+            - name: POSTGRES_USER
+              valueFrom:
+                configMapKeyRef:
+                  name: honeydue-config
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: honeydue-secrets
+                  key: POSTGRES_PASSWORD
+            - name: PGDATA
+              value: /var/lib/postgresql/data/pgdata
+          volumeMounts:
+            - name: postgres-data
+              mountPath: /var/lib/postgresql/data
+            - name: run
+              mountPath: /var/run/postgresql
+            - name: tmp
+              mountPath: /tmp
+          resources:
+            requests:
+              cpu: 100m
+              memory: 128Mi
+            limits:
+              cpu: "1"
+              memory: 1Gi
+          readinessProbe:
+            exec:
+              command: ["pg_isready", "-U", "honeydue"]
+            initialDelaySeconds: 5
+            periodSeconds: 10
+            timeoutSeconds: 5
+          livenessProbe:
+            exec:
+              command: ["pg_isready", "-U", "honeydue"]
+            initialDelaySeconds: 30
+            periodSeconds: 30
+            timeoutSeconds: 5
+      volumes:
+        - name: postgres-data
+          persistentVolumeClaim:
+            claimName: postgres-data
+        - name: run
+          emptyDir: {}
+        - name: tmp
+          emptyDir:
+            sizeLimit: 64Mi

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

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: postgres-data
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: postgres
+    app.kubernetes.io/part-of: honeydue
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 10Gi

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

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: honeydue
+  labels:
+    app.kubernetes.io/name: postgres
+    app.kubernetes.io/part-of: honeydue
+spec:
+  type: ClusterIP
+  selector:
+    app.kubernetes.io/name: postgres
+  ports:
+    - port: 5432
+      targetPort: 5432
+      protocol: TCP