chore: [Orchestration] Improve Streaming Sample Code (#243)

* Update Streaming test

* Merge with changes from main

* Update

Author: MatKuhr

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/controllers/OrchestrationController.java

@@ -56,7 +56,7 @@ ResponseEntity<String> completion(
   @GetMapping("/streamChatCompletion")
   @Nonnull
   ResponseEntity<ResponseBodyEmitter> streamChatCompletion() {
-    return service.streamChatCompletion(100);
+    return service.streamChatCompletion("developing a software project");
   }
 
   /**

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

@@ -239,12 +239,10 @@ public OrchestrationChatResponse grounding(@Nonnull final String groundingInput)
    * @return the emitter that streams the assistant message response
    */
   @Nonnull
-  public ResponseEntity<ResponseBodyEmitter> streamChatCompletion(final int numberOfFibonacci) {
+  public ResponseEntity<ResponseBodyEmitter> streamChatCompletion(@Nonnull final String topic) {
     final var prompt =
         new OrchestrationPrompt(
-            "Can you give me the first "
-                + numberOfFibonacci
-                + " numbers of the Fibonacci sequence?");
+            "Please create a small story about " + topic + " with around 700 words.");
     final var stream = client.streamChatCompletion(prompt, config);
 
     final var emitter = new ResponseBodyEmitter();