fix: remove unnecessary tobytes() calls for file byte retrieval

--bug=1060633 --user=刘瑞斌 【应用】图片理解节点解析图片报错 https://www.tapd.cn/57709429/s/1758154

Author: liuruibin

apps/application/flow/step_node/document_extract_node/impl/base_document_extract_node.py

@@ -66,7 +66,7 @@ def save_image(image_list):
 
         for doc in document:
             file = QuerySet(File).filter(id=doc['file_id']).first()
-            buffer = io.BytesIO(file.get_byte().tobytes())
+            buffer = io.BytesIO(file.get_byte())
             buffer.name = doc['name']  # this is the important line
 
             for split_handle in (parse_table_handle_list + split_handles):

apps/application/flow/step_node/image_understand_step_node/impl/base_image_understand_node.py

@@ -62,7 +62,7 @@ def file_id_to_base64(file_id: str):
     file = QuerySet(File).filter(id=file_id).first()
     file_bytes = file.get_byte()
     base64_image = base64.b64encode(file_bytes).decode("utf-8")
-    return [base64_image, what(None, file_bytes.tobytes())]
+    return [base64_image, what(None, file_bytes)]
 
 
 class BaseImageUnderstandNode(IImageUnderstandNode):
@@ -172,7 +172,7 @@ def generate_message_list(self, image_model, system: str, prompt: str, history_m
                 file = QuerySet(File).filter(id=file_id).first()
                 image_bytes = file.get_byte()
                 base64_image = base64.b64encode(image_bytes).decode("utf-8")
-                image_format = what(None, image_bytes.tobytes())
+                image_format = what(None, image_bytes)
                 images.append({'type': 'image_url', 'image_url': {'url': f'data:image/{image_format};base64,{base64_image}'}})
             messages = [HumanMessage(
                 content=[

apps/application/flow/step_node/speech_to_text_step_node/impl/base_speech_to_text_node.py

@@ -32,7 +32,7 @@ def process_audio_item(audio_item, model):
             # 根据file_name 吧文件转成mp3格式
             file_format = file.file_name.split('.')[-1]
             with tempfile.NamedTemporaryFile(delete=False, suffix=f'.{file_format}') as temp_file:
-                temp_file.write(file.get_byte().tobytes())
+                temp_file.write(file.get_byte())
                 temp_file_path = temp_file.name
             with tempfile.NamedTemporaryFile(delete=False, suffix='.mp3') as temp_amr_file:
                 temp_mp3_path = temp_amr_file.name