[ci skip] Flatten module wrappers into stack roots

Remove the module "xxx" { source = "./module" } indirection layer
from all 66 service stacks. Resources are now defined directly in
each stack's main.tf instead of through a wrapper module.

- Merge module/main.tf contents into stack main.tf
- Apply variable replacements (var.tier -> local.tiers.X, renamed vars)
- Fix shared module paths (one fewer ../ at each level)
- Move extra files/dirs (factory/, chart_values, subdirs) to stack root
- Update state files to strip module.<name>. prefix
- Update CLAUDE.md to reflect flat structure

Verified: terragrunt plan shows 0 add, 0 destroy across all stacks.

stacks/linkwarden/main.tf

@@ -13,11 +13,121 @@ locals {
   }
 }
 
-module "linkwarden" {
-  source = "./module"
-  tls_secret_name                = var.tls_secret_name
-  postgresql_password            = var.linkwarden_postgresql_password
-  authentik_client_id            = var.linkwarden_authentik_client_id
-  authentik_client_secret        = var.linkwarden_authentik_client_secret
-  tier                           = local.tiers.aux
+resource "kubernetes_namespace" "linkwarden" {
+  metadata {
+    name = "linkwarden"
+    labels = {
+      tier = local.tiers.aux
+    }
+  }
+}
+
+module "tls_secret" {
+  source          = "../../modules/kubernetes/setup_tls_secret"
+  namespace       = kubernetes_namespace.linkwarden.metadata[0].name
+  tls_secret_name = var.tls_secret_name
+}
+
+resource "random_string" "secret" {
+  length           = 32
+  special          = true
+  override_special = "/@£$"
+}
+
+resource "kubernetes_deployment" "linkwarden" {
+  metadata {
+    name      = "linkwarden"
+    namespace = kubernetes_namespace.linkwarden.metadata[0].name
+    labels = {
+      app  = "linkwarden"
+      tier = local.tiers.aux
+    }
+    annotations = {
+      "reloader.stakater.com/search" = "true"
+    }
+  }
+  spec {
+    replicas = 1
+    selector {
+      match_labels = {
+        app = "linkwarden"
+      }
+    }
+    template {
+      metadata {
+        labels = {
+          app = "linkwarden"
+        }
+        annotations = {
+          "diun.enable"       = "false"
+          "diun.include_tags" = "latest"
+        }
+      }
+      spec {
+        container {
+          image = "ghcr.io/linkwarden/linkwarden:latest"
+          name  = "linkwarden"
+
+          port {
+            container_port = 3000
+          }
+          env {
+            name  = "DATABASE_URL"
+            value = "postgresql://linkwarden:${var.linkwarden_postgresql_password}@postgresql.dbaas.svc.cluster.local:5432/linkwarden"
+          }
+          env {
+            name  = "NEXT_PUBLIC_AUTHENTIK_ENABLED"
+            value = "true"
+          }
+          env {
+            name  = "NEXTAUTH_SECRET"
+            value = random_string.secret.result
+          }
+          env {
+            name  = "NEXTAUTH_URL"
+            value = "https://linkwarden.viktorbarzin.me/api/v1/auth"
+          }
+          env {
+            name  = "AUTHENTIK_ISSUER"
+            value = "https://authentik.viktorbarzin.me/application/o/linkwarden"
+          }
+          env {
+            name  = "AUTHENTIK_CLIENT_ID"
+            value = var.linkwarden_authentik_client_id
+          }
+          env {
+            name  = "AUTHENTIK_CLIENT_SECRET"
+            value = var.linkwarden_authentik_client_secret
+          }
+        }
+      }
+    }
+  }
+}
+resource "kubernetes_service" "linkwarden" {
+  metadata {
+    name      = "linkwarden"
+    namespace = kubernetes_namespace.linkwarden.metadata[0].name
+    labels = {
+      app = "linkwarden"
+    }
+  }
+
+  spec {
+    selector = {
+      app = "linkwarden"
+    }
+    port {
+      name        = "linkwarden"
+      port        = 80
+      target_port = 3000
+    }
+  }
+}
+
+module "ingress" {
+  source          = "../../modules/kubernetes/ingress_factory"
+  namespace       = kubernetes_namespace.linkwarden.metadata[0].name
+  name            = "linkwarden"
+  tls_secret_name = var.tls_secret_name
 }