feat:support dify message streaming output (#1437)

* fix:lark adapter listeners init problem

* feat:support dify streaming mode

* feat:remove some log

* fix(bot form): field desc missing

* fix: not compatible with chatflow

---------

Co-authored-by: wangzejie <wangzejie@meicai.cn>
Co-authored-by: Junyan Qin <rockchinq@gmail.com>

templates/metadata/pipeline/ai.yaml

@@ -138,6 +138,21 @@ stages:
             label:
               en_US: Remove
               zh_Hans: 移除
+      - name: enable-streaming
+        label:
+          en_US: enable streaming mode
+          zh_Hans: 开启流式输出
+        type: boolean
+        required: true
+        default: false
+      - name: output-batch-size
+        label:
+          en_US: output batch size
+          zh_Hans: 输出批次大小(积累多少条消息后一起输出)
+        type: integer
+        required: true
+        default: 10
+
   - name: dashscope-app-api
     label:
       en_US: Aliyun Dashscope App API