debug: Add access logging to Traefik

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

smoothschedule/compose/production/traefik/traefik.yml

@@ -1,6 +1,14 @@
 log:
   level: DEBUG
 
+accessLog:
+  filePath: "/dev/stdout"
+  format: json
+  fields:
+    headers:
+      names:
+        Host: keep
+
 api:
   dashboard: true
   insecure: true