fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip]

6d224861 came from a --no-checkout worktree whose empty index made the
commit drop every file except two. This restores 05b50d2b's full tree and
correctly adds stacks/stem95su/gdrive-sync.tf + the service-catalog stem95su
entry. Forward-only (parent=6d224861, no force-push); [ci skip] since the
live infra was never applied from the broken commit.

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

stacks/rbac/main.tf

@@ -0,0 +1,23 @@
+variable "tls_secret_name" { type = string }
+variable "ssh_private_key" {
+  type      = string
+  default   = ""
+  sensitive = true
+}
+
+data "vault_kv_secret_v2" "secrets" {
+  mount = "secret"
+  name  = "platform"
+}
+
+locals {
+  k8s_users = jsondecode(data.vault_kv_secret_v2.secrets.data["k8s_users"])
+}
+
+module "rbac" {
+  source          = "./modules/rbac"
+  tier            = local.tiers.cluster
+  tls_secret_name = var.tls_secret_name
+  k8s_users       = local.k8s_users
+  ssh_private_key = var.ssh_private_key
+}