WebSockets Next: support OpenTelemetry's SpanAttribute annotation placed on endpoint callback arguments

extensions/websockets-next/deployment/pom.xml

@@ -89,6 +89,12 @@
             <artifactId>opentelemetry-sdk-testing</artifactId>
             <scope>test</scope>
         </dependency>
+        <!-- This dependency is used to test OpenTelemetry annotations on endpoints -->
+        <dependency>
+            <groupId>io.opentelemetry.instrumentation</groupId>
+            <artifactId>opentelemetry-instrumentation-annotations</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>io.opentelemetry.semconv</groupId>
             <artifactId>opentelemetry-semconv</artifactId>

extensions/websockets-next/deployment/src/main/java/io/quarkus/websockets/next/deployment/MessageCallbackArgument.java

@@ -6,7 +6,7 @@ class MessageCallbackArgument implements CallbackArgument {
 
     @Override
     public boolean matches(ParameterContext context) {
-        return context.acceptsMessage() && context.parameterAnnotations().isEmpty();
+        return context.acceptsMessage();
     }
 
     @Override