HHH-19737 add missing @since annotations to new SPIs

hibernate-core/src/main/java/org/hibernate/engine/creation/spi/SharedSessionBuilderImplementor.java

@@ -20,6 +20,8 @@
 
 /**
  * @author Steve Ebersole
+ *
+ * @since 7.2
  */
 public interface SharedSessionBuilderImplementor extends SharedSessionBuilder, SessionBuilderImplementor {
 	@Override

hibernate-core/src/main/java/org/hibernate/engine/spi/StatelessSessionImplementor.java

@@ -10,6 +10,8 @@
  * SPI extension of StatelessSession
  *
  * @author Steve Ebersole
+ *
+ * @since 7.2
  */
 public interface StatelessSessionImplementor extends StatelessSession, SharedSessionContractImplementor {
 	@Override

hibernate-core/src/main/java/org/hibernate/engine/spi/TransactionCompletionCallbacks.java

@@ -11,6 +11,8 @@
  * callbacks related to transaction completion.
  *
  * @author Steve Ebersole
+ *
+ * @since 7.2
  */
 @Incubating
 public interface TransactionCompletionCallbacks {