Disable service connection monitoring for CPU/C-state testing

Temporarily disable excessive connection monitoring in ServiceCollector
to test impact on CPU load and C-states. Keep nginx sites and docker
containers as they are needed for sub-service display functionality.

Disabled monitoring:
- SSH connections (ss commands)
- Database connections (PostgreSQL, MySQL, Redis)
- Web service connections (Apache, Gitea, Immich, etc.)
- Network service connections (Mosquitto, UniFi, etc.)

This eliminates most external command calls while preserving essential
nginx and docker sub-service enumeration.

agent/src/collectors/service.rs

@@ -432,11 +432,15 @@ impl ServiceCollector {
 
     async fn get_service_description(&self, service: &str) -> Option<Vec<String>> {
         let result = match service {
-            "sshd" | "ssh" => self.get_ssh_active_users().await.map(|s| vec![s]),
+            // KEEP: nginx sites and docker containers (needed for sub-services)
             "nginx" => self.get_nginx_description().await.map(|s| vec![s]),
+            "docker" => self.get_docker_containers().await,
+            
+            // DISABLED: All connection monitoring for CPU/C-state testing
+            /*
+            "sshd" | "ssh" => self.get_ssh_active_users().await.map(|s| vec![s]),
             "apache2" | "httpd" => self.get_web_server_connections().await.map(|s| vec![s]),
             "docker-registry" => self.get_docker_registry_info().await.map(|s| vec![s]),
-            "docker" => self.get_docker_containers().await,
             "postgresql" | "postgres" => self.get_postgres_connections().await.map(|s| vec![s]),
             "mysql" | "mariadb" => self.get_mysql_connections().await.map(|s| vec![s]),
             "redis" | "redis-immich" => self.get_redis_info().await.map(|s| vec![s]),
@@ -446,6 +450,7 @@ impl ServiceCollector {
             "unifi" => self.get_unifi_info().await.map(|s| vec![s]),
             "mosquitto" => self.get_mosquitto_info().await.map(|s| vec![s]),
             "haasp-webgrid" => self.get_haasp_webgrid_info().await.map(|s| vec![s]),
+            */
             _ => None,
         };