Assign sequential pod IDs from the master with NVS-stable bindings.

Replaces MAC-byte self-IDs with master allocation (1–255), slave preferred-ID reconnect, debug reset via UART/UI, and rate-limited ASSIGN to avoid ESP-NOW NO_MEM storms.

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

goTool/autotest/config_test.go

@@ -2,7 +2,7 @@ package autotest
 
 import "testing"
 
-func TestNewBenchClientIDFromMAC(t *testing.T) {
+func TestNewBenchNoDefaultClientIDFromMAC(t *testing.T) {
 	cfg := Config{
 		ID:        "t",
 		Network:   1,
@@ -20,8 +20,39 @@ func TestNewBenchClientIDFromMAC(t *testing.T) {
 		t.Fatal(err)
 	}
 	s, _ := b.Slave("pod")
-	if *s.ClientID != 16 {
-		t.Fatalf("client_id=%d want 16", *s.ClientID)
+	if s.ClientID != nil {
+		t.Fatalf("client_id should be unset, got %d", *s.ClientID)
+	}
+	if _, err := b.ResolveClientID("pod"); err == nil {
+		t.Fatal("ResolveClientID should fail without client_id")
+	}
+}
+
+func TestNewBenchExplicitClientID(t *testing.T) {
+	id := uint(3)
+	cfg := Config{
+		ID:        "t",
+		Network:   1,
+		MasterMAC: "aa:bb:cc:dd:ee:ff",
+		UART: UARTConfig{
+			Master: "/dev/ttyUSB0",
+		},
+		Slaves: []SlaveNode{{
+			ID:       "pod",
+			MAC:      "50:78:7d:18:01:10",
+			ClientID: &id,
+		}},
+	}
+	b, err := NewBench(cfg)
+	if err != nil {
+		t.Fatal(err)
+	}
+	got, err := b.ResolveClientID("pod")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != 3 {
+		t.Fatalf("client_id=%d want 3", got)
 	}
 }