migrate consuming stacks to ESO + remove k8s-dashboard static token

Phase 9: ExternalSecret migration across 26 stacks:

Fully migrated (vault data source removed, ESO delivers secrets):
- speedtest, shadowsocks, wealthfolio, plotting-book, f1-stream, tandoor
- n8n, dawarich, diun, netbox, onlyoffice, tuya-bridge
- hackmd (ESO template for DB URL), health (ESO template for DB URL)
- trading-bot (ESO template for DATABASE_URL + 7 secret env vars)
- forgejo (removed unused vault data source)

Partially migrated (vault kept for plan-time, ESO added for runtime):
- immich, linkwarden, nextcloud, paperless-ngx (jsondecode for homepage)
- claude-memory, rybbit, url, webhook_handler (plan-time in locals/jobs)
- woodpecker, openclaw, resume (plan-time in helm values/jobs/modules)

17 stacks unchanged (all plan-time: homepage annotations, configmaps,
module inputs) — vault data source works with OIDC auth.

Phase 17a: Remove k8s-dashboard static admin token secret.
Users now get tokens via: vault write kubernetes/creds/dashboard-admin

stacks/linkwarden/main.tf

@@ -23,6 +23,33 @@ resource "kubernetes_namespace" "linkwarden" {
   }
 }
 
+resource "kubernetes_manifest" "external_secret" {
+  manifest = {
+    apiVersion = "external-secrets.io/v1beta1"
+    kind       = "ExternalSecret"
+    metadata = {
+      name      = "linkwarden-secrets"
+      namespace = "linkwarden"
+    }
+    spec = {
+      refreshInterval = "15m"
+      secretStoreRef = {
+        name = "vault-kv"
+        kind = "ClusterSecretStore"
+      }
+      target = {
+        name = "linkwarden-secrets"
+      }
+      dataFrom = [{
+        extract = {
+          key = "linkwarden"
+        }
+      }]
+    }
+  }
+  depends_on = [kubernetes_namespace.linkwarden]
+}
+
 module "tls_secret" {
   source          = "../../modules/kubernetes/setup_tls_secret"
   namespace       = kubernetes_namespace.linkwarden.metadata[0].name
@@ -93,12 +120,22 @@ resource "kubernetes_deployment" "linkwarden" {
             value = "https://authentik.viktorbarzin.me/application/o/linkwarden"
           }
           env {
-            name  = "AUTHENTIK_CLIENT_ID"
-            value = data.vault_kv_secret_v2.secrets.data["authentik_client_id"]
+            name = "AUTHENTIK_CLIENT_ID"
+            value_from {
+              secret_key_ref {
+                name = "linkwarden-secrets"
+                key  = "authentik_client_id"
+              }
+            }
           }
           env {
-            name  = "AUTHENTIK_CLIENT_SECRET"
-            value = data.vault_kv_secret_v2.secrets.data["authentik_client_secret"]
+            name = "AUTHENTIK_CLIENT_SECRET"
+            value_from {
+              secret_key_ref {
+                name = "linkwarden-secrets"
+                key  = "authentik_client_secret"
+              }
+            }
           }
           resources {
             requests = {

stacks/linkwarden/providers.tf

@@ -13,12 +13,6 @@ variable "kube_config_path" {
   default = "~/.kube/config"
 }
 
-variable "vault_root_token" {
-  type      = string
-  sensitive = true
-  default   = ""
-}
-
 provider "kubernetes" {
   config_path = var.kube_config_path
 }
@@ -31,6 +25,5 @@ provider "helm" {
 
 provider "vault" {
   address          = "https://vault.viktorbarzin.me"
-  token            = var.vault_root_token
   skip_child_token = true
 }