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/cnpg/modules/cnpg/main.tf

@@ -1,67 +0,0 @@
-variable "tier" { type = string }
-
-# -----------------------------------------------------------------------------
-# Namespace
-# -----------------------------------------------------------------------------
-resource "kubernetes_namespace" "cnpg_system" {
-  metadata {
-    name = "cnpg-system"
-    labels = {
-      tier = var.tier
-    }
-  }
-  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"]]
-  }
-}
-
-# -----------------------------------------------------------------------------
-# CloudNativePG Operator — manages PostgreSQL clusters via CRDs
-# https://cloudnative-pg.io/
-# -----------------------------------------------------------------------------
-resource "helm_release" "cnpg" {
-  namespace        = kubernetes_namespace.cnpg_system.metadata[0].name
-  create_namespace = false
-  name             = "cnpg"
-  atomic           = true
-  timeout          = 300
-
-  repository = "https://cloudnative-pg.github.io/charts"
-  chart      = "cloudnative-pg"
-  version    = "0.27.1"
-
-  values = [yamlencode({
-    crds = {
-      create = true
-    }
-
-    replicaCount = 1
-
-    resources = {
-      requests = {
-        cpu    = "100m"
-        memory = "256Mi"
-      }
-      limits = {
-        memory = "256Mi"
-      }
-    }
-
-    # Tune webhook-cert renewal threshold. CNPG default is 7 days remaining,
-    # which leaves no buffer when the cluster-health check (#22) flags
-    # certs at <30d. Bump to 30 days so the operator rotates well before
-    # external monitoring notices. Cert lifetime stays at chart default 90d.
-    config = {
-      data = {
-        EXPIRING_CHECK_THRESHOLD = "30"
-      }
-    }
-  })]
-}
-
-# NOTE: local-path-provisioner is already installed in the cluster
-# (via cloud-init template) with StorageClass "local-path" (default).
-# ReclaimPolicy is "Delete" — for CNPG clusters, set
-# .spec.storage.pvcTemplate.storageClassName = "local-path" in the
-# Cluster CR. CNPG handles PVC lifecycle independently.