infra(proxmox): bump node disks to 64GB OS + 128GB Longhorn data (per operator)

infra/tofu/variables.tf

@@ -91,13 +91,13 @@ variable "memory_mib" {
 variable "os_disk_gib" {
   description = "OS (root) disk size per node, GiB. Imported from the cloud image, on the Storage datastore."
   type        = number
-  default     = 40
+  default     = 64
 }
 
 variable "data_disk_gib" {
   description = "Dedicated Longhorn data disk per node, GiB. Blank, on the Storage datastore."
   type        = number
-  default     = 100
+  default     = 128
 }
 
 variable "cpu_type" {