fix minor

Author: rpanackal

orchestration/src/main/java/com/sap/ai/sdk/orchestration/OrchestrationHttpExecutor.java

@@ -88,7 +88,7 @@ Stream<OrchestrationChatCompletionDelta> stream(
 
       val client = getHttpClient();
       MDC.put("endpoint", path);
-      MDC.put("method", "streaming");
+      MDC.put("mode", "streaming");
       logRequestStart();
       return new ClientStreamingHandler<>(
               OrchestrationChatCompletionDelta.class, OrchestrationError.Streaming.class, FACTORY)