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/sealed-secrets/modules/sealed-secrets/main.tf

@@ -0,0 +1,50 @@
+variable "tier" { type = string }
+
+# -----------------------------------------------------------------------------
+# Namespace
+# -----------------------------------------------------------------------------
+resource "kubernetes_namespace" "sealed_secrets" {
+  metadata {
+    name = "sealed-secrets"
+    labels = {
+      tier = var.tier
+      "keel.sh/enrolled" = "true"
+    }
+  }
+  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"]]
+  }
+}
+
+# -----------------------------------------------------------------------------
+# Sealed Secrets — encrypts secrets for safe git storage
+# https://github.com/bitnami-labs/sealed-secrets
+# -----------------------------------------------------------------------------
+resource "helm_release" "sealed_secrets" {
+  namespace        = kubernetes_namespace.sealed_secrets.metadata[0].name
+  create_namespace = false
+  name             = "sealed-secrets"
+  atomic           = true
+  timeout          = 300
+
+  repository = "https://bitnami-labs.github.io/sealed-secrets"
+  chart      = "sealed-secrets"
+  version    = "2.18.3"
+
+  values = [yamlencode({
+    crds = {
+      create = true
+    }
+
+    resources = {
+      requests = {
+        cpu    = "50m"
+        memory = "192Mi"
+      }
+      limits = {
+        memory = "192Mi"
+      }
+    }
+  })]
+}