Migrate all service modules from nginx-ingress to Traefik

- Remove nginx-specific ingress variables (use_proxy_protocol, proxy_timeout, additional_configuration_snippet)
- Update ingress annotations to use Traefik middleware CRDs
- Delete nginx-ingress module (replaced by traefik)
- Add new traefik middleware.tf for shared middleware definitions
- Update service modules to work with new ingress_factory interface

modules/kubernetes/paperless-ngx/main.tf

@@ -154,10 +154,6 @@ module "ingress" {
   tls_secret_name = var.tls_secret_name
   port            = 80
   extra_annotations = {
-    "nginx.ingress.kubernetes.io/proxy-body-size" : "0"
-    # see https://github.com/kubernetes/ingress-nginx/blob/main/docs/user-guide/nginx-configuration/annotations.md#rate-limiting for all annotations
-    # "nginx.ingress.kubernetes.io/limit-rpm": "5"
-
     "gethomepage.dev/enabled"     = "true"
     "gethomepage.dev/description" = "Document library"
     # gethomepage.dev/group: Media