refactor(automations): detect manual payment via OrderTransaction.manualPaymentGateway

- Drop wireTransferGatewayNames from ShopSettings (new migration).
- Replace string-matching with a GraphQL query against
  Order.transactions[].manualPaymentGateway, the first-class flag
  Shopify exposes for any merchant-defined manual payment method.
- Both webhook handlers now fetch the order on the fly to classify it,
  removing the configurable gateway-names field from settings.

app/routes/webhooks.orders.create.tsx

@@ -3,14 +3,14 @@ import { authenticate } from "../shopify.server";
 import db from "../db.server";
 import {
   generateAndEmailInvoice,
-  isWireTransferOrder,
+  isManualPaymentOrder,
 } from "../services/invoice/automations.server";
 
 /**
- * orders/create — Automation 1: when a wire-transfer order is placed,
- * immediately generate and email the invoice (which includes the bank
- * details + GiroCode) so the customer can pay. Other orders are ignored
- * here; they're handled by orders/fulfilled (Automation 2).
+ * orders/create — Automation 1: when a wire-transfer (manual-payment-gateway)
+ * order is placed, immediately generate and email the invoice (which includes
+ * the bank details + GiroCode) so the customer can pay. Other orders are
+ * ignored here; they're handled by orders/fulfilled (Automation 2).
  */
 export const action = async ({ request }: ActionFunctionArgs) => {
   const { shop, topic, payload, session, admin } = await authenticate.webhook(request);
@@ -24,12 +24,9 @@ export const action = async ({ request }: ActionFunctionArgs) => {
   const orderId = payload?.id;
   if (orderId == null) return new Response();
 
-  const gateways: string[] = Array.isArray(payload?.payment_gateway_names)
-    ? payload.payment_gateway_names
-    : [];
-  if (!isWireTransferOrder(gateways, settings.wireTransferGatewayNames)) {
-    return new Response();
-  }
+  const orderGid = `gid://shopify/Order/${String(orderId).replace(/^.*\//, "")}`;
+  const isManual = await isManualPaymentOrder(admin, orderGid);
+  if (!isManual) return new Response();
 
   try {
     const result = await generateAndEmailInvoice({