fix(traefik): upgrade fail2ban plugin to v0.9.0 and fix config schema

v0.7.1 caused 403 on all routes. v0.9.0 renamed whitelist→allowlist,
changed ip to a comma-separated string, and added enabled/statuscode fields.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

traefik/dynamic/fail2ban.yaml

@@ -3,13 +3,11 @@ http:
     fail2ban:
       plugin:
         fail2ban:
+          allowlist:
+            ip: "127.0.0.1/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,::1"
           rules:
             bantime: "3h"
             findtime: "10m"
             maxretry: 5
-          whitelist:
-            ip:
-              - "127.0.0.1/8"
-              - "10.0.0.0/8"
-              - "172.16.0.0/12"
-              - "192.168.0.0/16"
+            enabled: true
+            statuscode: "400,401,403-499"