feat: enable checking if it should actually run

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/cli.rs

@@ -31,6 +31,13 @@ pub async fn execute() -> anyhow::Result<()> {
                     setup_labels.insert(k, v);
                 }
 
+                if !setup_labels.contains_key("node_name") {
+                    setup_labels.insert(
+                        "node_name".into(),
+                        petname::petname(2, "-").expect("to be able to generate a valid petname"),
+                    );
+                }
+
                 agent::setup_config(discovery, force, setup_labels).await?;
                 tracing::info!("wrote default agent config");
             }