report udp stats from validator (#20587)

core/src/lib.rs

@@ -49,6 +49,7 @@ pub mod sigverify;
 pub mod sigverify_shreds;
 pub mod sigverify_stage;
 pub mod snapshot_packager_service;
+pub mod system_monitor_service;
 pub mod test_validator;
 pub mod tower_storage;
 pub mod tpu;