REFACTOR(traefik): switch from HAProxy

- to Traefik ingress controller
- Update all ingress files to use ingressClassName: traefik
- Update cert-manager ClusterIssuer to use traefik class
- Remove haproxy.org annotations from ingress files
- Update vault helm-values to use traefik

cert-manager/cluster-issuer.yaml

@@ -17,8 +17,8 @@ spec:
       name: letsencrypt-prod
 
     # HTTP-01 challenge를 사용하여 도메인 소유권 검증
-    # HAProxy Ingress를 통해 /.well-known/acme-challenge/ 경로로 검증
+    # Traefik Ingress를 통해 /.well-known/acme-challenge/ 경로로 검증
     solvers:
     - http01:
         ingress:
-          class: haproxy
+          class: traefik