samples revisited after teched

packages/orders-service/db/schema.cds

@@ -0,0 +1,17 @@
+namespace sap.capire.orders;
+using { Currency, cuid, managed } from '@sap/cds/common';
+
+
+entity Orders : cuid, managed {
+  OrderNo  : String @title:'Order Number'; //> readable key
+  Items    : Composition of many OrderItems on Items.parent = $self;
+  total    : Decimal(9,2) @readonly;
+  currency : Currency;
+}
+
+entity OrderItems : cuid {
+  parent    : Association to Orders not null;
+  article   : String;
+  amount    : Integer;
+  netAmount : Decimal(9,2);
+}