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/stem95su/main.tf

@@ -1,173 +0,0 @@
-# STEM educational platform for 95. СУ „Проф. Иван Шишманов" (Sofia).
-# Public, open static site at stem95su.viktorbarzin.me. Self-contained HTML
-# pages + media authored externally (Gemini exports), served by a stock nginx
-# straight off the PVE host NFS — NOT baked into an image, so content can be
-# updated out-of-band (Nextcloud "PVE NFS Pool" or rsync to /srv/nfs/stem-site)
-# without a rebuild. Auto-backed-up offsite by the existing nfs-mirror job.
-
-resource "kubernetes_namespace" "stem95su" {
-  metadata {
-    name = "stem95su"
-    labels = {
-      "istio-injection" : "disabled"
-      tier = local.tiers.aux
-    }
-  }
-  lifecycle {
-    # KYVERNO_LIFECYCLE_V1: goldilocks-vpa-auto-mode ClusterPolicy stamps this label on every namespace
-    ignore_changes = [metadata[0].labels["goldilocks.fairwinds.com/vpa-update-mode"]]
-  }
-}
-
-module "tls_secret" {
-  source          = "../../modules/kubernetes/setup_tls_secret"
-  namespace       = kubernetes_namespace.stem95su.metadata[0].name
-  tls_secret_name = var.tls_secret_name
-}
-
-# Content lives on the PVE host NFS. NOTE: the nfs_volume module creates only
-# the K8s PV+PVC — the export subdir (/srv/nfs/stem-site) must already exist on
-# 192.168.1.127 or the pod fails to mount (mount.nfs exit 32). It is created
-# during deploy and re-created on demand if ever lost.
-module "nfs_content" {
-  source       = "../../modules/kubernetes/nfs_volume"
-  name         = "stem95su-content"
-  namespace    = kubernetes_namespace.stem95su.metadata[0].name
-  nfs_server   = var.nfs_server
-  nfs_path     = "/srv/nfs/stem-site"
-  storage      = "1Gi"
-  access_modes = ["ReadWriteMany"]
-}
-
-# Minimal nginx server block: serve the static dir, with the dashboard
-# (stem_board.html) as the directory index so "/" loads the platform home.
-# All other pages/assets are reached by their exact filenames (the dashboard
-# links to them by name — those must not be renamed).
-resource "kubernetes_config_map" "nginx_conf" {
-  metadata {
-    name      = "stem95su-nginx-conf"
-    namespace = kubernetes_namespace.stem95su.metadata[0].name
-  }
-  data = {
-    "default.conf" = <<-EOT
-      server {
-          listen       80;
-          server_name  _;
-          root   /usr/share/nginx/html;
-          index  stem_board.html index.html;
-      }
-    EOT
-  }
-}
-
-resource "kubernetes_deployment" "stem95su" {
-  metadata {
-    name      = "stem95su"
-    namespace = kubernetes_namespace.stem95su.metadata[0].name
-    labels = {
-      run  = "stem95su"
-      tier = local.tiers.aux
-    }
-  }
-  spec {
-    replicas = 1
-    selector {
-      match_labels = {
-        run = "stem95su"
-      }
-    }
-    template {
-      metadata {
-        labels = {
-          run = "stem95su"
-        }
-      }
-      spec {
-        container {
-          image = "nginx:1.28-alpine"
-          name  = "nginx"
-          resources {
-            limits = {
-              memory = "64Mi"
-            }
-            requests = {
-              cpu    = "10m"
-              memory = "64Mi"
-            }
-          }
-          port {
-            container_port = 80
-          }
-          volume_mount {
-            name       = "content"
-            mount_path = "/usr/share/nginx/html"
-            read_only  = true
-          }
-          volume_mount {
-            name       = "nginx-conf"
-            mount_path = "/etc/nginx/conf.d"
-            read_only  = true
-          }
-          readiness_probe {
-            http_get {
-              path = "/"
-              port = 80
-            }
-            initial_delay_seconds = 3
-            period_seconds        = 10
-          }
-        }
-        volume {
-          name = "content"
-          persistent_volume_claim {
-            claim_name = module.nfs_content.claim_name
-          }
-        }
-        volume {
-          name = "nginx-conf"
-          config_map {
-            name = kubernetes_config_map.nginx_conf.metadata[0].name
-          }
-        }
-      }
-    }
-  }
-  lifecycle {
-    ignore_changes = [
-      spec[0].template[0].spec[0].dns_config, # KYVERNO_LIFECYCLE_V1
-    ]
-  }
-}
-
-resource "kubernetes_service" "stem95su" {
-  metadata {
-    name      = "stem95su"
-    namespace = kubernetes_namespace.stem95su.metadata[0].name
-    labels = {
-      run = "stem95su"
-    }
-  }
-  spec {
-    selector = {
-      run = "stem95su"
-    }
-    port {
-      name        = "http"
-      port        = "80"
-      target_port = "80"
-    }
-  }
-}
-
-module "ingress" {
-  source = "../../modules/kubernetes/ingress_factory"
-  # auth = "none": public static educational site for 95. СУ, open to the internet by design — CrowdSec + ai-bot-block gate bots; no login.
-  auth            = "none"
-  namespace       = kubernetes_namespace.stem95su.metadata[0].name
-  name            = "stem95su"
-  service_name    = kubernetes_service.stem95su.metadata[0].name
-  port            = "80"
-  host            = "stem95su"
-  dns_type        = "proxied"
-  tls_secret_name = var.tls_secret_name
-}