authentik: boot-persistent quadlet conversion with deploy handler

The compose-era authentik trio died at every boot (rootless podman does not
auto-start bare containers). Convert the trio to Quadlet units installed by
deploy-remote.sh into ~/.config/containers/systemd/, enabled + WantedBy=
default.target:

- 3 unit files under dankclaw/authentik/quadlet/ (postgres -> server -> worker
  ordering via Wants=/After=; secrets stay in the git-ignored host .env,
  expanded by systemd at start time exactly like the gitea units)
- deploy_authentik() handler: install units, daemon-reload, retire stale
  compose-era containers only while units are inactive, enable once, then
  start in dependency order with podman-health gates between stages
- compose.yaml: authentik service definitions retired to a comment pointing at
  the quadlet dir (same pattern as searxng/open-webui/gitea/caddy)
- tests/authentik.bats rewritten from compose assertions to unit-file
  contract assertions (images, Exec roles, ordering, loopback-only publish,
  pg_isready probe, secret hygiene, dispatch routing)

dankclaw/authentik/quadlet/authentik-server.container

@@ -0,0 +1,46 @@
+# Quadlet unit: Authentik core + embedded Caddy outpost (rootless, boot-persistent).
+#
+# Install path on dankclaw: ~/.config/containers/systemd/authentik-server.container
+# Unit name: authentik-server.service (podman 5.x drops the container- prefix)
+#
+# The embedded outpost serves /outpost.goauthentik.io/* including the
+# /auth/caddy forward_auth endpoint the Caddyfile chains to — no outpost token
+# exists for this deployment by design. Resolved by name (A2A DNS) from every
+# container on dankclaw_default, including caddy. The 9000 publish is
+# loopback-only on purpose: LAN clients reach Authentik through Caddy, never
+# around it; the loopback publish exists so host-side tooling can probe
+# /-/health/. Runs as the image default user (same userns mapping the compose
+# era used, so the existing /data ownership carries over unchanged).
+
+[Unit]
+Description=Authentik server container
+After=network.target authentik-postgres.service
+Wants=authentik-postgres.service
+
+[Container]
+ContainerName=authentik-server
+Image=ghcr.io/goauthentik/server:2026.8.0
+Exec=server
+Network=dankclaw_default
+EnvironmentFile=/home/dank/serverAppConfigs/dankclaw/.env
+Environment=AUTHENTIK_POSTGRESQL__HOST=authentik-postgres
+Environment=AUTHENTIK_POSTGRESQL__NAME=authentik
+Environment=AUTHENTIK_POSTGRESQL__USER=authentik
+Environment=AUTHENTIK_POSTGRESQL__PASSWORD=${AUTHENTIK_PG_PASS}
+Environment=AUTHENTIK_SECRET_KEY=${AUTHENTIK_SECRET_KEY}
+PublishPort=127.0.0.1:9000:9000
+HealthCmd=python -c "import urllib.request;urllib.request.urlopen('http://localhost:9000/-/health/')"
+--shm-size=512m
+HealthInterval=30s
+HealthTimeout=10s
+HealthRetries=5
+HealthStartPeriod=30s
+
+[Service]
+EnvironmentFile=/home/dank/serverAppConfigs/dankclaw/.env
+TimeoutStartSec=900
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=default.target