Initial CSI setup — democratic-csi + NFS on int

- controller.nomad: CSI controller pinned to int
- node.nomad: CSI node plugin (int only for now, expand later)
- volumes/example.hcl: template for creating new volumes

NFS: int exports /opt/csi-volumes to 192.168.15.0/24
Plugin ID: org.democratic-csi.nfs

csi/volumes/example.hcl

@@ -0,0 +1,14 @@
+# Example: create a named CSI volume for use in pipelines
+# Usage: nomad volume create nomad-jobs/csi/example-volume.hcl
+#
+id           = "my-app-data"
+name         = "my-app-data"
+type         = "csi"
+plugin_id    = "org.democratic-csi.nfs"
+capacity_min = "1GiB"
+capacity_max = "50GiB"
+
+capability {
+  access_mode     = "single-node-writer"
+  attachment_mode = "file-system"
+}