Address lookup to mocked S/4HANA system

What's working:
- Address information on OP
- Reading of S/4HANA Addresses
- Translations

packages/bookshop/db/schema.cds

@@ -1,5 +1,6 @@
 namespace sap.capire.bookshop;
 using { Currency, managed, cuid } from '@sap/cds/common';
+using { API_BUSINESS_PARTNER.A_BusinessPartnerAddress as extAddresses } from '../srv/external/API_BUSINESS_PARTNER.csn';
 
 entity Books : managed {
   key ID : Integer;
@@ -26,6 +27,7 @@ entity Orders : cuid, managed {
   Items    : Composition of many OrderItems on Items.parent = $self;
   total    : Decimal(9,2) @readonly;
   currency : Currency;
+  shippingAddress : Association to one ShippingAddresses; // TODO: Composition or Association?
 }
 entity OrderItems : cuid {
   parent    : Association to Orders;
@@ -33,3 +35,11 @@ entity OrderItems : cuid {
   amount    : Integer;
   netAmount : Decimal(9,2);
 }
+
+// TODO: Use external information
+entity ShippingAddresses  {
+  key AddressID: String;
+  CityName: String @readonly;
+  StreetName: String @readonly;
+  HouseNumber: String @readonly;
+}