feat(fc-network): add FlowerCore.Network app (read-only pfSense plane, ADR-189)

Stand up the pfSense automation plane (Phase 0, read-only) on RKE2 as an
ArgoCD-managed workload at network.iamworkin.lan.

- namespace fc-network
- Deployment fc-network-web: localhost/fc-network-web:v20260612-0b5b049,
  imagePullPolicy Never, port 5340, /healthz probes, runAsNonRoot 1654 +
  readOnlyRootFilesystem, RWO-safe RollingUpdate (maxSurge 0/maxUnavailable 1),
  auth gate-OFF, SQLite + snapshot-store + intended-model paths under /data.
- PVC fc-network-web-data (longhorn, 2Gi): SQLite index + on-box snapshot store
  (full-fidelity raw config.xml stays on-box; service surfaces redacted only).
- Service (ClusterIP 80 -> 5340), Certificate (ClusterIssuer step-ca-acme),
  IngressRoute (network.iamworkin.lan, all methods — POST ingest is local-only).
- kustomization.yaml for local previews / single-app validation.

The ApplicationSet git generator picks this up as infra-fc-network; if it lags,
the Application is applied manually (documented pattern).

apps/fc-network/pvc.yaml

@@ -0,0 +1,27 @@
+# Persistent store for FlowerCore.Network (read-only pfSense automation plane).
+#
+# Holds the SQLite snapshot INDEX db (network.db) AND the on-box snapshot store
+# (data/snapshots): full-fidelity raw config.xml + redacted inventory sidecars +
+# an on-box git history. Full-fidelity config is on-box ONLY (this PVC); the
+# service DB / REST / MCP / UI only ever surface the REDACTED projection.
+# RWO — single replica, scale 0->1 for updates (never rollout restart).
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: fc-network-web-data
+  namespace: fc-network
+  labels:
+    app: fc-network-web
+    app.kubernetes.io/name: fc-network-web
+    app.kubernetes.io/component: web
+    app.kubernetes.io/part-of: flowercore
+    app.kubernetes.io/managed-by: argocd
+    flowercore.io/tenant-id: system
+    flowercore.io/created-by: bluejay-infra
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: 2Gi