migrate 16 plan-time stacks: vault data source → ESO + kubernetes_secret

Replaced data "vault_kv_secret_v2" with:
1. ExternalSecret (ESO syncs Vault KV → K8s Secret)
2. data "kubernetes_secret" (reads ESO-created secret at plan time)

This removes the Vault provider dependency at plan time for these
stacks — they now only need K8s API access, not a Vault token.

Stacks: actualbudget, affine, audiobookshelf, calibre, changedetection,
coturn, freedify, freshrss, grampsweb, navidrome, novelapp, ollama,
owntracks, real-estate-crawler, servarr, ytdlp

stacks/affine/main.tf

@@ -4,13 +4,43 @@ variable "tls_secret_name" {
 }
 variable "nfs_server" { type = string }
 
-data "vault_kv_secret_v2" "secrets" {
-  mount = "secret"
-  name  = "affine"
+resource "kubernetes_manifest" "external_secret" {
+  manifest = {
+    apiVersion = "external-secrets.io/v1beta1"
+    kind       = "ExternalSecret"
+    metadata = {
+      name      = "affine-secrets"
+      namespace = "affine"
+    }
+    spec = {
+      refreshInterval = "15m"
+      secretStoreRef = {
+        name = "vault-kv"
+        kind = "ClusterSecretStore"
+      }
+      target = {
+        name = "affine-secrets"
+      }
+      dataFrom = [{
+        extract = {
+          key = "affine"
+        }
+      }]
+    }
+  }
+  depends_on = [kubernetes_namespace.affine]
+}
+
+data "kubernetes_secret" "eso_secrets" {
+  metadata {
+    name      = "affine-secrets"
+    namespace = kubernetes_namespace.affine.metadata[0].name
+  }
+  depends_on = [kubernetes_manifest.external_secret]
 }
 
 locals {
-  mailserver_accounts = jsondecode(data.vault_kv_secret_v2.secrets.data["mailserver_accounts"])
+  mailserver_accounts = jsondecode(data.kubernetes_secret.eso_secrets.data["mailserver_accounts"])
 }
 variable "redis_host" { type = string }
 variable "postgresql_host" { type = string }
@@ -36,7 +66,7 @@ locals {
   common_env = [
     {
       name  = "DATABASE_URL"
-      value = "postgresql://affine:${data.vault_kv_secret_v2.secrets.data["db_password"]}@${var.postgresql_host}:5432/affine"
+      value = "postgresql://affine:${data.kubernetes_secret.eso_secrets.data["db_password"]}@${var.postgresql_host}:5432/affine"
     },
     {
       name  = "REDIS_SERVER_HOST"
@@ -99,6 +129,9 @@ resource "kubernetes_deployment" "affine" {
       app  = "affine"
       tier = local.tiers.aux
     }
+    annotations = {
+      "reloader.stakater.com/auto" = "true"
+    }
   }
   spec {
     replicas = 1