feat(fc-devicemgmt): add Kubernetes deployment manifests (#1)

Sprint 8 IMPL lane Cx-5: fc-devicemgmt K8s manifests (rebased onto main 2026-05-18; 13 files, +944).

Namespace + Web Deployment (replicas:2, MySQL backend) + Operator Deployment (replicas:1, KubeOps leader-elect) + Service + Certificate (step-ca-acme ClusterIssuer) + Traefik IngressRoute (devices.iamworkin.lan internal) + ServiceAccount + ClusterRole + ClusterRoleBinding + NetworkPolicy (CNI DNAT-aware backend ports) + OnePasswordItem (5-field consolidated) + ArgoCD Application bootstrap shape + lint coverage.

Follow-ups (not merge blockers):
- localhost/fc-devicemgmt-{web,operator}:v20260512-cx5 must be imported to all 3 RKE2 nodes; pods will ErrImageNeverPull until imported.
- 1Password vault item 'FlowerCore DeviceManagement Runtime' must be created with 5 fields before pods can start.
- DNS devices.iamworkin.lan -> 10.0.56.200 already present.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/fc-devicemgmt/clusterrole-operator.yaml

@@ -0,0 +1,81 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: fc-devicemgmt-operator
+  labels:
+    app.kubernetes.io/name: fc-devicemgmt-operator
+    app.kubernetes.io/component: operator
+    app.kubernetes.io/part-of: flowercore
+    app.kubernetes.io/managed-by: argocd
+    flowercore.io/tenant-id: system
+    flowercore.io/created-by: bluejay-infra
+rules:
+  - apiGroups:
+      - devices.flowercore.io
+    resources:
+      - '*'
+    verbs:
+      - get
+      - list
+      - watch
+      - create
+      - update
+      - patch
+      - delete
+  - apiGroups:
+      - devices.flowercore.io
+    resources:
+      - devices/status
+      - devices/finalizers
+      - devicegroups/status
+      - devicegroups/finalizers
+      - devicepolicies/status
+      - devicepolicies/finalizers
+      - remotecommands/status
+      - remotecommands/finalizers
+    verbs:
+      - get
+      - update
+      - patch
+  - apiGroups:
+      - apps
+    resources:
+      - deployments
+    verbs:
+      - get
+  - apiGroups:
+      - ""
+    resources:
+      - pods
+      - services
+      - configmaps
+      - secrets
+      - events
+    verbs:
+      - get
+      - list
+      - watch
+      - create
+      - update
+      - patch
+      - delete
+  - apiGroups:
+      - batch
+    resources:
+      - jobs
+    verbs:
+      - get
+      - list
+      - watch
+      - create
+      - update
+      - patch
+      - delete
+  - apiGroups:
+      - networking.k8s.io
+    resources:
+      - networkpolicies
+    verbs:
+      - get
+      - list
+      - watch