R-753: the box tells visitors apart — cloudflared at a fixed address, traefik trusts only it, the controller reads the hop traefik saw

- felhom-tunnel network 172.16.253.0/29 (ip-range .4/30): cloudflared alone at .2, traefik at .3; traefik's websecure
  trusts forwarded headers from 172.16.253.2/32 only, and every request passes felhom-forwarded@file, which removes
  the client-writable host/path/address headers (X-Forwarded-Host/-Uri/-Method/-Prefix, Forwarded, True-Client-Ip, …)
  and fixes X-Forwarded-Port to 443 (measured: Cloudflare passes a client's X-Forwarded-Host/-Port).
- EnsureBaseStack reconciles a RUNNING traefik/cloudflared whose rendered files changed (recreate), refuses a rewrite
  that would drop a certificate resolver, and moves cloudflared only once traefik is on the tunnel network.
- clientIP: believed only when the TCP peer is traefik; the rightmost X-Forwarded-For entry (the hop traefik saw);
  the tunnel hop → CF-Connecting-IP (the edge refuses a client-sent one, measured 403). rateKey: IPv6 per /64.
  Dashboard login, claim, share and escrow counters key on it; the setup gate logs it.
- Dashboard login messages: keys, informal voice, both languages.
Red-proofs: RP-A1 (leftmost hop), RP-A2 (shared tunnel key), RP-A3 (no reconcile) — felhom.eu audits/visitors-2026-10-01/A.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/infra/templates/traefik-compose.yml.tmpl

@@ -22,9 +22,20 @@ services:
       - ./dynamic:/etc/traefik/dynamic:ro
       - ./acme.json:/etc/traefik/acme.json
       - ./certs:/etc/traefik/certs:ro
+{{- if .Tunnel}}
+    networks:
+      traefik-public: {}
+      {{.TunnelNetwork}}:
+        ipv4_address: {{.TunnelTraefikAddr}}
+{{- else}}
     networks:
       - traefik-public
+{{- end}}
 
 networks:
   traefik-public:
     external: true
+{{- if .Tunnel}}
+  {{.TunnelNetwork}}:
+    external: true
+{{- end}}