fix pmd violations

Author: rpanackal

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/services/OrchestrationService.java

@@ -127,7 +127,7 @@ public OrchestrationChatResponse inputFiltering(@Nonnull final AzureFilterThresh
   @Nonnull
   public OrchestrationChatResponse outputFiltering(@Nonnull final AzureFilterThreshold policy) {
 
-    var systemMessage = Message.system("Give three paraphrases for the following sentence");
+    final var systemMessage = Message.system("Give three paraphrases for the following sentence");
     // Reliably triggering the content filter of models fine-tuned for ethical compliance
     // is difficult. The prompt below may be rendered ineffective in the future.
     final var prompt =
@@ -137,7 +137,7 @@ public OrchestrationChatResponse outputFiltering(@Nonnull final AzureFilterThres
         new AzureContentFilter().hate(policy).selfHarm(policy).sexual(policy).violence(policy);
 
     final var configWithFilter = config.withOutputFiltering(filterConfig);
-    var response = client.chatCompletion(prompt, configWithFilter);
+    final var response = client.chatCompletion(prompt, configWithFilter);
 
     try {
       response.getContent();

sample-code/spring-app/src/test/java/com/sap/ai/sdk/app/controllers/OrchestrationTest.java

@@ -99,7 +99,7 @@ void testTemplate() {
     assertThat(usage.getPromptTokens()).isGreaterThan(1);
     assertThat(usage.getTotalTokens()).isGreaterThan(1);
   }
-  
+
   @Test
   void testMessagesHistory() {
     CompletionPostResponse result =