fix(invoice): use shippingLine.deliveryCategory as primary pickup signal

Order 1032 on dev still rendered as 'Versandart: Lager Graz' because the
shipping line's title/code/source contained no 'pickup' keyword — only
`shippingLine.deliveryCategory == "pickup"` flagged it as a pickup.

`shippingLine.deliveryCategory` only requires `read_orders` (already
granted), so query and use it as the primary signal. Keep the regex on
title/code/source/carrier as a fallback for custom rates without a proper
pickup category.

app/services/invoice/loadOrderForInvoice.server.ts

@@ -83,6 +83,10 @@ export interface RawShippingLine {
   code: string | null;
   source: string | null;
   carrierIdentifier: string | null;
+  /** Lowercase string like "shipping", "pickup", "local_pickup". Used as
+   *  the primary pickup signal because it doesn't require the
+   *  fulfillment-orders scope. */
+  deliveryCategory: string | null;
   originalPriceSet: { shopMoney: RawMoney } | null;
   discountedPriceSet: { shopMoney: RawMoney } | null;
   taxLines: RawTaxLine[];
@@ -156,6 +160,7 @@ const QUERY = `#graphql
         code
         source
         carrierIdentifier
+        deliveryCategory
         originalPriceSet { shopMoney { amount currencyCode } }
         discountedPriceSet { shopMoney { amount currencyCode } }
         taxLines {