add javadoc to QueryProducer

Author: gavinking

hibernate-reactive-core/src/main/java/org/hibernate/reactive/mutiny/Mutiny.java

@@ -485,6 +485,13 @@ default Query<R> setLockMode(String alias, LockModeType lockModeType) {
 		Query<R> enableFetchProfile(String profileName);
 	}
 
+	/**
+	 * Operations common to objects which act as factories for instances of
+	 * {@link Query}. This is a common supertype of {@link Session} and
+	 * {@link StatelessSession}.
+	 *
+	 * @since 3.0
+	 */
 	interface QueryProducer {
 		/**
 		 * Create an instance of {@link SelectionQuery} for the given HQL/JPQL

hibernate-reactive-core/src/main/java/org/hibernate/reactive/stage/Stage.java

@@ -483,6 +483,13 @@ default Query<R> setLockMode(String alias, LockModeType lockModeType) {
 		Query<R> setComment(String comment);
 	}
 
+	/**
+	 * Operations common to objects which act as factories for instances of
+	 * {@link Query}. This is a common supertype of {@link Session} and
+	 * {@link StatelessSession}.
+	 *
+	 * @since 3.0
+	 */
 	interface QueryProducer  {
 		/**
 		 * Create an instance of {@link SelectionQuery} for the given HQL/JPQL