clarify some stuff about session mgt with reactive repositories

Author: gavinking

documentation/src/main/asciidoc/introduction/Processor.adoc

@@ -304,7 +304,7 @@ Hibernate Processor defaults to using `EntityManager` as the session type, but o
 
 - `Session`,
 - `StatelessSession`, or
-- `Mutiny.Session` from Hibernate Reactive.
+- `Mutiny.Session` or `Mutiny.StatelessSession` from Hibernate Reactive.
 
 The real value of all this is in the checks which can now be done at compile time.
 Hibernate Processor verifies that the parameters of our abstract method declaration match the parameters of the HQL query, for example:

documentation/src/main/asciidoc/repositories/Reactive.adoc

@@ -49,6 +49,8 @@ interface Library {
 
 It's _not_ possible to mix blocking and non-blocking operations in the same repository interface.
 
+IMPORTANT: Depending on how you're managing the stateless session, you might need to declare the resource accessor method with the type `Uni<Mutiny.StatelessSession>`.
+
 === Obtaining a reactive repository
 
 To make use of our reactive repository, we'll need to bootstrap Hibernate Reactive and obtain a `Mutiny.SessionFactory`.
@@ -61,7 +63,9 @@ Mutiny.SessionFactory factory =
                 .unwrap(Mutiny.SessionFactory.class);
 ----
 
-Please refer to the documentation for Hibernate Reactive for more information on this topic.
+Please refer to the https://hibernate.org/reactive/documentation/[documentation for Hibernate Reactive] for more information on this topic.
+
+TIP: In Quarkus, this step is unnecessary, and you can let Quarkus manage and inject the reactive `SessionFactory`.
 
 Once we have the `SessionFactory`, we can easily obtain a `Mutiny.StatelessSession`, and use it to instantiate our repository:
 
@@ -73,7 +77,11 @@ factory.withStatelessTransaction(session -> {
 })
 ----
 
-TIP: In Quarkus, all this is unnecessary, and you can directly inject the `Library`.
+TIP: An even better approach is to make a `@RequestScoped` instance of `Mutiny.StatelessSession` or `Uni<Mutiny.StatelessSession>` available for injection by CDI.
+Then the `Library` repository itself may be directly injected, and you won't have to worry about managing the stateless session in application program code.
+This is a little bit tricky to get working perfectly, so hopefully by the time you're reading this, there will already be a built-in implementation in Quarkus.
+
+// TIP: In Quarkus, all this is unnecessary, and you can directly inject the `Library`.
 
 === Calling a reactive repository