Fix: For large Inventory databases fetch is not a good idea

(cherry picked from commit 2cb66cd8)

server/src/main/java/org/gringlobal/persistence/InventoryRepositoryCustomImpl.java

@@ -122,7 +122,7 @@ public class InventoryRepositoryCustomImpl implements InventoryRepositoryCustom
 
 		// get total elements
 		// FIXME querydsl 5.0 supports fetchCount()
-		var totalElements = aggQuery.fetch().size();
+		var totalElements = aggQuery.fetchCount();
 
 		// apply pagination
 		aggQuery.offset(page.getOffset()).limit(page.getPageSize());