Add sudo for VPN namespace access

Use sudo to access vpn namespace for external IP query.
Requires corresponding sudo permission in NixOS config.

Version: v0.1.234

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.233"
+version = "0.1.234"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/systemd.rs

@@ -855,6 +855,7 @@ impl SystemdCollector {
         let output = Command::new("timeout")
             .args(&[
                 "5",
+                "sudo",
                 "ip",
                 "netns",
                 "exec",