feat(v2): order 补 biz_code + webhook payload 带 product_biz_code(收口 P2 延后项)

internal/gateway/settle_test.go

@@ -53,6 +53,29 @@ func TestSettleHappyIdempotentAndWebhook(t *testing.T) {
 	}
 }
 
+func TestSettleWebhookCarriesProductBizCode(t *testing.T) {
+	g, fp, spy, orders := newGateway(t)
+	ctx := context.Background()
+	res, _ := g.CreateOrder(ctx, gateway.CreateOrderInput{
+		SKU: "pro_year", Method: "fake", BizSystem: "pangolin", BizRef: "u-9",
+	})
+	ref := attemptRef(t, orders)
+	fp.SetQueryResult(ref, provider.PaidEvent{
+		ProviderRef: ref, Status: provider.PaidSucceeded,
+		PaidAmountMinor: 29990000, PaidCurrency: "USDT",
+	})
+	if _, err := g.SyncPendingAttempts(ctx, 10); err != nil {
+		t.Fatalf("sync: %v", err)
+	}
+	if len(spy.calls) != 1 {
+		t.Fatalf("want 1 webhook, got %d", len(spy.calls))
+	}
+	if spy.calls[0]["product_biz_code"] != "pro_year" {
+		t.Fatalf("payload product_biz_code = %v, want pro_year", spy.calls[0]["product_biz_code"])
+	}
+	_ = res
+}
+
 func TestSettleGuards(t *testing.T) {
 	g, _, spy, orders := newGateway(t)
 	ctx := context.Background()