Set default advise stream response mode to on-finish

spring-ai-core/src/main/java/org/springframework/ai/chat/client/advisor/AbstractChatMemoryAdvisor.java

@@ -65,6 +65,11 @@ public String getName() {
 		return this.getClass().getSimpleName();
 	}
 
+	@Override
+	public StreamResponseMode getStreamResponseMode() {
+		return StreamResponseMode.AGGREGATE;
+	}
+
 	protected T getChatMemoryStore() {
 		return this.chatMemoryStore;
 	}

spring-ai-core/src/main/java/org/springframework/ai/chat/client/advisor/QuestionAnswerAdvisor.java

@@ -136,6 +136,11 @@ public ChatResponse adviseResponse(ChatResponse response, Map<String, Object> co
 		return chatResponseBuilder.build();
 	}
 
+	@Override
+	public StreamResponseMode getStreamResponseMode() {
+		return StreamResponseMode.ON_FINISH_ELEMENT;
+	}
+
 	protected Filter.Expression doGetFilterExpression(Map<String, Object> context) {
 
 		if (!context.containsKey(FILTER_EXPRESSION)

spring-ai-core/src/main/java/org/springframework/ai/chat/client/advisor/SimpleLoggerAdvisor.java

@@ -79,4 +79,9 @@ public String toString() {
 		return SimpleLoggerAdvisor.class.getSimpleName();
 	}
 
+	@Override
+	public StreamResponseMode getStreamResponseMode() {
+		return StreamResponseMode.AGGREGATE;
+	}
+
 }

spring-ai-core/src/main/java/org/springframework/ai/chat/client/advisor/api/ResponseAdvisor.java

@@ -78,7 +78,7 @@ public enum StreamResponseMode {
 	}
 
 	default StreamResponseMode getStreamResponseMode() {
-		return StreamResponseMode.AGGREGATE;
+		return StreamResponseMode.ON_FINISH_ELEMENT;
 	}
 
 	/**