added index on link

Author: foderking

src/main/java/foderking/speculate/Laptop.java

@@ -7,6 +7,7 @@
 import java.util.*;
 
 @Entity
+@Table(indexes = {@Index(columnList = "LINK")})
 public class Laptop implements Serializable {
     @Id
     @GeneratedValue(strategy = GenerationType.UUID)