HHH-18545 Use CLASS retention for documentation annotations

Author: beikov

hibernate-core/src/main/java/org/hibernate/cfg/Compatibility.java

@@ -19,7 +19,7 @@
  * considered temporary and are usually also {@linkplain Deprecated deprecated}.
  */
 @Target(ElementType.FIELD)
-@Retention(RetentionPolicy.RUNTIME)
+@Retention(RetentionPolicy.CLASS)
 @Documented
 public @interface Compatibility {
 }

hibernate-core/src/main/java/org/hibernate/cfg/Unsafe.java

@@ -18,7 +18,7 @@
  * are largely considered unsupported.
  */
 @Target(ElementType.FIELD)
-@Retention(RetentionPolicy.RUNTIME)
+@Retention(RetentionPolicy.CLASS)
 @Documented
 public @interface Unsafe {
 }