Initial scaffold

- Terraform module for groups, SAML/OAuth2/LDAP providers, applications, and LDAP outposts
- Data-driven YAML config with Terragrunt config loader
- Environment: identity.unkin.net with Consul backend
- Provider: goauthentik/authentik 2026.5.0
- Woodpecker CI pipelines (pre-commit, plan, apply)
- Makefile with Vault AppRole and K8s auth support

environments/root.hcl

@@ -0,0 +1,32 @@
+generate "backend" {
+  path      = "backend.tf"
+  if_exists = "overwrite"
+  contents  = <<EOF
+provider "authentik" {
+  url   = "https://${path_relative_to_include()}"
+  token = var.authentik_token
+}
+
+variable "authentik_token" {
+  type      = string
+  sensitive = true
+}
+
+terraform {
+  backend "consul" {
+    address = "https://consul.service.consul"
+    path    = "infra/terraform/authentik/${path_relative_to_include()}/state"
+    scheme  = "https"
+    lock    = true
+    ca_file = "/etc/pki/tls/certs/ca-bundle.crt"
+  }
+  required_version = ">= 1.10"
+  required_providers {
+    authentik = {
+      source  = "goauthentik/authentik"
+      version = "2026.5.0"
+    }
+  }
+}
+EOF
+}