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/cmd_autotest.go

@@ -9,7 +9,7 @@ import (
 	"powerpod/gotool/autotest"
 )
 
-func runTest(sp *serialPort, args []string) error {
+func runTest(portOverride string, baudOverride int, args []string) error {
 	fs := flag.NewFlagSet("test", flag.ExitOnError)
 	configName := fs.String("config", "", "bench config id or path (testdata/configs/)")
 	scenarioName := fs.String("scenario", "", "scenario id or path (testdata/scenarios/)")
@@ -49,14 +49,37 @@ func runTest(sp *serialPort, args []string) error {
 		return fmt.Errorf("load scenario: %w", err)
 	}
 
+	port := portOverride
+	if port == "" {
+		port = bench.UART.Master
+	}
+	baud := baudOverride
+	if baud <= 0 {
+		baud = int(bench.UART.Baud)
+	}
+
+	sp, err := openSerial(port, baud)
+	if err != nil {
+		return fmt.Errorf("open %s: %w", port, err)
+	}
+	defer sp.Close()
+
 	if !*verbose {
 		log.SetOutput(io.Discard)
 	}
 
 	fmt.Printf("bench config %q (network %d, master %s)\n",
 		bench.ID, bench.Network, bench.MasterMAC)
+	fmt.Printf("  uart.master %s (baud %d)\n", bench.UART.Master, bench.UART.Baud)
+	if bench.UART.MasterConsole != "" {
+		fmt.Printf("  uart.master_console %s\n", bench.UART.MasterConsole)
+	}
 	for _, s := range bench.Slaves {
-		fmt.Printf("  slave %q mac=%s client_id=%d\n", s.ID, s.MAC, *s.ClientID)
+		line := fmt.Sprintf("  slave %q mac=%s client_id=%d", s.ID, s.MAC, *s.ClientID)
+		if s.Console != "" {
+			line += fmt.Sprintf(" console=%s", s.Console)
+		}
+		fmt.Println(line)
 	}
 	fmt.Printf("scenario %q (%d steps)\n\n", sc.ID, len(sc.Steps))