Add bench UART ports and cold-start reset to goTool autotest.

Bench configs define command and console serial paths; scenarios can
reset nodes via esptool before tests. Smoke resets all nodes then waits
for ESP-NOW join.

Co-authored-by: Cursor <cursoragent@cursor.com>

goTool/autotest/runner.go

@@ -92,11 +92,42 @@ func runStep(bench *Bench, step Step, client MasterClient) error {
 		return checkDeadzone(bench, step, client)
 	case "unicast_test", "unicast":
 		return checkUnicastTest(bench, step, client)
+	case "reset", "reboot":
+		return checkReset(bench, step)
 	default:
 		return fmt.Errorf("unknown command %q", step.Command)
 	}
 }
 
+type resetInput struct {
+	Target  string `json:"target"`
+	Slave   string `json:"slave"`
+	All     bool   `json:"all"`
+	WaitMS  int    `json:"wait_ms"`
+}
+
+func checkReset(bench *Bench, step Step) error {
+	var in resetInput
+	if len(step.Input) > 0 {
+		if err := json.Unmarshal(step.Input, &in); err != nil {
+			return fmt.Errorf("input: %w", err)
+		}
+	}
+
+	if in.All {
+		return bench.ResetAll(in.WaitMS)
+	}
+
+	target := in.Target
+	if in.Slave != "" {
+		target = in.Slave
+	}
+	if target == "" {
+		target = "master"
+	}
+	return bench.ResetTargets([]string{target}, in.WaitMS)
+}
+
 func checkVersion(step Step, client MasterClient) error {
 	ver, err := client.GetVersion()
 	if err != nil {