stem95su: scheduled Drive->site sync CronJob (every 10m)

CronJob stem95su-gdrive-sync (*/10) mounts the content PVC RW and
rclone-syncs the read-only Drive folder "claude" (stem claude/files) onto
it (rclone/rclone:1.74.3, scope=drive.readonly, empty-source guard +
--max-delete 25). ESO ExternalSecret stem95su-rclone <- Vault
secret/stem95su. Requires the GCP OAuth app published to Production or the
refresh token expires ~weekly.

Lands the gdrive-sync stack on master (it had landed on a feature branch
by accident on the shared devvm checkout).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

stacks/postiz/modules/postiz/variables.tf

@@ -1,40 +0,0 @@
-variable "tls_secret_name" {
-  type        = string
-  sensitive   = true
-  description = "Name of the wildcard TLS Secret to copy into the postiz namespace."
-}
-
-variable "tier" {
-  type        = string
-  description = "Workload tier label applied to the namespace (e.g. 4-aux)."
-}
-
-variable "namespace" {
-  type        = string
-  default     = "postiz"
-  description = "Kubernetes namespace for Postiz."
-}
-
-variable "host" {
-  type        = string
-  default     = "postiz"
-  description = "Ingress hostname label (joined with root_domain by ingress_factory)."
-}
-
-variable "image_tag" {
-  type        = string
-  default     = "v2.21.7"
-  description = "Postiz container image tag."
-}
-
-variable "chart_version" {
-  type        = string
-  default     = "1.0.5"
-  description = "Postiz Helm chart version (OCI ghcr.io/gitroomhq/postiz-helmchart)."
-}
-
-variable "storage_size" {
-  type        = string
-  default     = "20Gi"
-  description = "Persistent volume size for /uploads."
-}