fix: add missing @service spring annotation

[plozanol]

All use cases should be annotated with spring @service, to create a bean component and make them singleton and injectable in other classes.

[mikededo]

Even if they do not use anything related with Jpa, is it required? Just a question

[plozanol]

Yes, it is useful because @Component, @Service, or @Repository are Spring annotations to denote a java bean, a class that once loaded will be reused during the runtime of the application, like a singleton.

Check the code of @Service, is just an alias of @Component:

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface Service {
    @AliasFor(
        annotation = Component.class
    )
    String value() default "";
}

[mikededo]

Understood! ✅