auth01: decommission host and remove authelia/lldap services

Remove auth01 host configuration and associated services in preparation
for new auth stack with different provisioning system.

Removed:
- hosts/auth01/ - host configuration
- services/authelia/ - authelia service module
- services/lldap/ - lldap service module
- secrets/auth01/ - sops secrets
- Reverse proxy entries for auth and lldap
- Monitoring alert rules for authelia and lldap
- SOPS configuration for auth01

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

services/http-proxy/proxy.nix

@@ -86,22 +86,6 @@
         }
         reverse_proxy http://jelly01.home.2rjus.net:8096
       }
-      lldap.home.2rjus.net {
-        log {
-          output file /var/log/caddy/auth.log {
-            mode 644
-          }
-        }
-        reverse_proxy http://auth01.home.2rjus.net:17170
-      }
-      auth.home.2rjus.net {
-        log {
-          output file /var/log/caddy/auth.log {
-            mode 644
-          }
-        }
-        reverse_proxy http://auth01.home.2rjus.net:9091
-      }
       pyroscope.home.2rjus.net {
         log {
           output file /var/log/caddy/pyroscope.log {