Add global HTTP to HTTPS redirect

All HTTP traffic now redirects to HTTPS at the entrypoint level,
eliminating the need for per-service redirect middleware.

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

stacks/traefik/traefik.yml

@@ -10,6 +10,11 @@ entryPoints:
     address: ":80"
     proxyProtocol:
       insecure: true
+    http:
+      redirections:
+        entryPoint:
+          to: https
+          scheme: https
   https:
     address: ":443"
     proxyProtocol: