Dual-write ENC data into encapi alongside Cobbler

Seed encapi (statuses, roles, prodnxsr node assignments) and make the
instance module also create an encapi_node for every VM, so the k8s
puppetserver ENC can cut over from Cobbler. Cobbler/puppetca/puppetdb
resources are left untouched.

- Add config/encapi leaf + modules/encapi driving statuses/roles/nodes
  from YAML (3 statuses, 51 roles, 13 prodnxsr physical nodes).
- Add encapi_node to modules/instance (certname, role, environment).
- Wire encapi provider into root.hcl required_providers and the module
  providers; plumb ENCAPI_WRITE_TOKEN via Makefile vault_env.

config/encapi/terragrunt.hcl

@@ -0,0 +1,19 @@
+locals {
+  statuses = yamldecode(file("${get_terragrunt_dir()}/statuses.yaml"))
+  roles    = yamldecode(file("${get_terragrunt_dir()}/roles.yaml"))
+  nodes    = yamldecode(file("${get_terragrunt_dir()}/nodes.yaml"))
+}
+
+include "root" {
+  path = find_in_parent_folders("root.hcl")
+}
+
+terraform {
+  source = "${get_repo_root()}/modules/encapi"
+}
+
+inputs = {
+  statuses = local.statuses
+  roles    = local.roles
+  nodes    = local.nodes
+}