refactor import usage. refactor invoices implementation

media-store/srv/manage-store-service.cds

@@ -0,0 +1,9 @@
+using {sap.capire.media.store as my} from '../db/schema';
+
+@(requires : 'employee')
+service ManageStore {
+    entity Tracks as projection on my.Tracks;
+    action addTrack(name : String(25), albumTitle : String(255), genreName : String(255), composer : String(255));
+    entity Albums as projection on my.Albums;
+    entity Genres as projection on my.Genres;
+}