Add Ansible storage role for NVMe setup and Longhorn dual-disk config

Automates LV expansion, NVMe mount, and Longhorn node disk tagging
(hdd/nvme) via Ansible instead of Kustomize-managed manifests.

infra/kubernetes/platform/longhorn/kustomization.yaml

@@ -4,4 +4,3 @@ resources:
   - application.yaml
   - namespace.yaml
   - servicemonitor.yaml
-  - node-disks.yaml

infra/kubernetes/platform/longhorn/node-disks.yaml

@@ -0,0 +1,26 @@
+# Patches the Longhorn Node to configure two disks with tags:
+#   - default-disk (HDD at /var/lib/longhorn/) tagged "hdd"
+#   - nvme-disk (NVMe at /mnt/nvme-storage/longhorn/) tagged "nvme"
+#
+# Apply after Longhorn is running and the NVMe is mounted:
+#   kubectl apply -f node-disks.yaml
+apiVersion: longhorn.io/v1beta2
+kind: Node
+metadata:
+  name: catherby
+  namespace: longhorn-system
+spec:
+  allowScheduling: true
+  disks:
+    hdd:
+      allowScheduling: true
+      path: /var/lib/longhorn/
+      storageReserved: 32212254720  # 30Gi reserved for system
+      tags:
+        - hdd
+    nvme:
+      allowScheduling: true
+      path: /mnt/nvme-storage/longhorn/
+      storageReserved: 10737418240  # 10Gi reserved
+      tags:
+        - nvme