Stop console tailer before SSH execution to prevent log duplication

crates/orchestrator/src/scheduler.rs

@@ -265,6 +265,10 @@ impl<H: Hypervisor + 'static> Scheduler<H> {
                                                         Duration::from_secs(exec_cfg.ssh_connect_timeout_secs),
                                                     ).await {
                                                         Ok(sess) => {
+                                                            // Stop console tailer — SSH is connected, runner output
+                                                            // will be captured via SSH stdout/stderr, not serial console.
+                                                            let _ = console_stop_tx.send(true);
+
                                                             // Upload runner binary
                                                             let runner_path = if is_illumos_label(&item.spec.label) {
                                                                 &exec_cfg.runner_illumos_path