Initial infrastructure mono-repo scaffold

Consolidates nixos, docker, raspi, and debian-configuration into a single
infrastructure-as-code repo. Includes:

- ansible/: full inventory + proxmox-hardening, freeipa, and raspberrypi
  roles (converted from debian-configuration bash scripts)
- terraform/: Proxmox VMs, Dynu DNS, Pi-hole (decommissioned stub),
  Docker container catalog — migrated from docker/infrastructure/terraform/
- stacks/docker/, stacks/raspi/, nixos/: placeholder READMEs pending
  git subtree population (see implementation plan)
- docs/: internal MkDocs site with architecture, network topology, runbooks,
  and drift-detection guide; external sanitized site
- scripts/: drift-detect.sh, docs-build.sh, install-hooks.sh, check-secrets.sh
- CI: secret-scan (push/PR), drift-detect (daily), docs-build (on change)
- Pi-hole removed throughout — DNS is FreeIPA, DHCP is router

See docs/internal/implementation-plan.md for the phased rollout after
pushing to Gitea.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UvNjoxTWEDkhXsd1Dq2ETP

terraform/docker/outputs.tf

@@ -0,0 +1,38 @@
+output "docker_host_in_use" {
+  description = "Docker daemon endpoint currently targeted by this workspace."
+  value       = var.docker_host
+}
+
+output "docker_containers" {
+  description = "Documentation-shaped inventory of Docker containers managed via services-up.sh compose sources."
+  value       = local.docker_containers
+}
+
+output "docker_inventory" {
+  description = "Compact Docker inventory suitable for export and merging into broader infrastructure docs."
+  value = {
+    compose_project = "core"
+    container_count = length(local.docker_containers)
+    containers = {
+      for key, container in local.docker_containers : key => {
+        compose_service = container.compose_service
+        compose_file    = container.compose_file
+        container_name  = container.container_name
+        image           = container.image
+        image_source    = container.image_source
+        build_context   = container.build_context
+        network_mode    = container.network_mode
+        networks        = container.networks
+        published_ports = container.published_ports
+        mounts          = container.mounts
+        restart_policy  = container.restart_policy
+        labels          = container.useful_labels
+      }
+    }
+  }
+}
+
+output "managed_container_names" {
+  description = "Names of containers intentionally tracked in Terraform documentation resources."
+  value       = sort(keys(local.docker_containers))
+}