HHH-15772 deprecate @Proxy and @Polymorphism

hibernate-core/src/main/java/org/hibernate/annotations/Polymorphism.java

@@ -45,11 +45,12 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
  * hierarchy, as defied by the JPA specification. "Implicit"
  * polymorphism is about queries that span multiple such
  * entity inheritance hierarchies.
- * <p>
- * This annotation is hardly ever useful.
+ *
+ * @deprecated This annotation is hardly ever useful.
  *
  * @author Steve Ebersole
  */
+@Deprecated(since = "6.2")
 @Target( TYPE )
 @Retention( RUNTIME )
 public @interface Polymorphism {

hibernate-core/src/main/java/org/hibernate/annotations/Proxy.java

@@ -14,10 +14,12 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
 /**
  * Allows the proxy class of an entity class to be explicitly specified.
- * This annotation is almost never useful.
+ *
+ * @deprecated This annotation is almost never useful.
  *
  * @author Emmanuel Bernard
  */
+@Deprecated(since = "6.2")
 @Target(TYPE)
 @Retention(RUNTIME)
 public @interface Proxy {

hibernate-core/src/main/java/org/hibernate/annotations/Target.java

@@ -21,7 +21,7 @@ import java.lang.annotation.RetentionPolicy;
  *             annotations, for example,
  *             {@link jakarta.persistence.OneToMany#targetEntity()}
  */
-@Deprecated
+@Deprecated(since = "6.2")
 @java.lang.annotation.Target({ElementType.FIELD, ElementType.METHOD})
 @Retention( RetentionPolicy.RUNTIME )
 public @interface Target {