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/_template/main.tf.example

@@ -1,91 +0,0 @@
-# =============================================================================
-# Stack Template — Copy this directory to stacks/<your-app>/ and customize.
-# Then submit a PR to the infra repo.
-# =============================================================================
-#
-# Prerequisites:
-#   1. You are a namespace-owner in k8s_users (Vault KV secret/platform)
-#   2. Your namespace already exists (created by vault stack)
-#   3. You have Vault CLI access: vault login -method=oidc
-#
-# Steps:
-#   1. cp -r stacks/_template stacks/myapp
-#   2. mv stacks/myapp/main.tf.example stacks/myapp/main.tf
-#   3. Search-replace <placeholders> below
-#   4. Store secrets: vault kv put secret/<your-username>/myapp KEY=value
-#   5. git checkout -b feat/myapp && git push
-#   6. Open PR, get reviewed, merge
-#   7. Admin runs: cd stacks/myapp && terragrunt apply
-# =============================================================================
-
-variable "tls_secret_name" {
-  type      = string
-  sensitive = true
-}
-
-# NOTE: Your namespace is auto-created by the vault stack from k8s_users.
-# Only add a kubernetes_namespace resource if you need a SEPARATE namespace
-# for this specific app (not your user namespace).
-
-module "tls_secret" {
-  source          = "../../modules/kubernetes/setup_tls_secret"
-  namespace       = "<your-namespace>"  # e.g., "anca"
-  tls_secret_name = var.tls_secret_name
-}
-
-resource "kubernetes_deployment" "app" {
-  metadata {
-    name      = "<app-name>"
-    namespace = "<your-namespace>"
-  }
-  spec {
-    replicas = 1
-    selector {
-      match_labels = { app = "<app-name>" }
-    }
-    template {
-      metadata {
-        labels = { app = "<app-name>" }
-      }
-      spec {
-        container {
-          name  = "<app-name>"
-          image = "<dockerhub-user>/<app-name>:<tag>"
-          port {
-            container_port = 8080  # Change to your app's port
-          }
-          resources {
-            requests = { cpu = "10m", memory = "256Mi" }
-            limits   = { memory = "256Mi" }
-          }
-        }
-      }
-    }
-  }
-  lifecycle {
-    ignore_changes = [spec[0].template[0].spec[0].dns_config] # KYVERNO_LIFECYCLE_V1
-  }
-}
-
-resource "kubernetes_service" "app" {
-  metadata {
-    name      = "<app-name>"
-    namespace = "<your-namespace>"
-  }
-  spec {
-    selector = { app = "<app-name>" }
-    port {
-      port        = 80
-      target_port = 8080  # Match container_port above
-    }
-  }
-}
-
-module "ingress" {
-  source          = "../../modules/kubernetes/ingress_factory"
-  namespace       = "<your-namespace>"
-  name            = "<app-name>"
-  tls_secret_name = var.tls_secret_name
-  dns_type        = "proxied"  # "proxied" (Cloudflare CDN), "non-proxied" (direct A/AAAA), or "none"
-  auth            = "required" # "required" (Authentik login), "public" (anonymous bound to guest), or "none" (no auth)
-}