Add uplink.tel and sequela.tel routing via ubuntu-prod proxy

- Add uplink.yml: Routes nitter, invidious, searx, freshrss, rsshub, radio
  through ubuntu-prod to docker-public backend
- Add sequela.yml: Routes wiki and matomo through ubuntu-prod to docker-public
- Update traefik.yml: Add proxyProtocol insecure:true for VPS HAProxy
  send-proxy compatibility

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

stacks/traefik/traefik.yml

@@ -8,8 +8,12 @@ api:
 entryPoints:
   http:
     address: ":80"
+    proxyProtocol:
+      insecure: true
   https:
     address: ":443"
+    proxyProtocol:
+      insecure: true
 
 providers:
   providersThrottleDuration: 2s