feat: homelab case study from live infra; Traefik-based deploy

- rewrote homelab (content + topology diagram + stack) from a live inspection of the host:
  Ubuntu 24.04, ~30 Docker services behind Traefik (Cloudflare-fronted, TLS, HTTP/3),
  Authentik SSO forward-auth, CrowdSec, Pi-hole, self-hosted Gitea + CI runner, socket-proxy,
  per-app network isolation; WordPress framed as being decommissioned (not future arch)
- deploy: docker-compose now uses Traefik labels + traefik_proxy network (was assumed nginx
  edge); .env.example adds SITE_HOST/TRAEFIK_ENTRYPOINT; colophon + ARCHITECTURE/DOCKER/
  DEPLOYMENT specs corrected nginx-edge -> Traefik (site container still serves via nginx)
- PROJECT_STATUS: pre-launch checklist updated; infra section added

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

site/src/components/pages/ColophonPage.astro

@@ -34,7 +34,7 @@ const copy = {
       ],
       [
         'Self-hosted',
-        'Built and deployed from my own Gitea instance to Docker behind nginx. The contact form is a small stateless .NET service — even that is part of my own stack.',
+        'Built and deployed from my own Gitea instance to Docker behind Traefik. The contact form is a small stateless .NET service — even that is part of my own stack.',
       ],
       [
         'No tracking',
@@ -59,7 +59,7 @@ const copy = {
       ],
       [
         'Egendriftet',
-        'Bygget og rullet ut fra min egen Gitea-instans til Docker bak nginx. Kontaktskjemaet er en liten tilstandsløs .NET-tjeneste — også den er en del av min egen stack.',
+        'Bygget og rullet ut fra min egen Gitea-instans til Docker bak Traefik. Kontaktskjemaet er en liten tilstandsløs .NET-tjeneste — også den er en del av min egen stack.',
       ],
       [
         'Ingen sporing',