Updated to use srv-to-srv + declared events

reviews/srv/reviews-service.cds

@@ -2,10 +2,17 @@ using { sap.capire.reviews as my } from '../db/schema';
 
 service ReviewsService {
 
+  // Sync API
   entity Reviews as projection on my.Reviews excluding { likes }
   action like (review: type of Reviews:ID);
   action unlike (review: type of Reviews:ID);
 
+  // Async API
+   event reviewed : {
+     subject: type of Reviews:subject;
+     rating: Decimal(2,1)
+   }
+
   // Input validation
   annotate Reviews with {
     subject  @mandatory;