Properly warn about missing javac -parameters flag

Closes: #1108

Author: geoand

core/deployment/src/main/java/io/quarkiverse/langchain4j/deployment/AiServicesProcessor.java

@@ -1362,16 +1362,16 @@ private List<TemplateParameterInfo> gatherTemplateParamInfo(List<MethodParameter
             }
         }
 
-        if ((templateParams.size() == 1) && (params.size() == 1)) {
-            // the special 'it' param is supported when the method only has one parameter
-            templateParams.add(new TemplateParameterInfo(0, "it"));
-        }
-
         if (!templateParams.isEmpty() && templateParams.stream().map(TemplateParameterInfo::name).allMatch(Objects::isNull)) {
             log.warn(
                     "The application has been compiled without the '-parameters' being set flag on javac. Make sure your build tool is configured to pass this flag to javac, otherwise Quarkus LangChain4j is unlikely to work properly without it.");
         }
 
+        if ((templateParams.size() == 1) && (params.size() == 1)) {
+            // the special 'it' param is supported when the method only has one parameter
+            templateParams.add(new TemplateParameterInfo(0, "it"));
+        }
+
         return templateParams;
     }