chore: 添加虚拟环境到仓库

- 添加 backend_service/venv 虚拟环境
- 包含所有Python依赖包
- 注意：虚拟环境约393MB，包含12655个文件

backend_service/venv/lib/python3.13/site-packages/dashscope/common/constants.py

@@ -0,0 +1,91 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
+from http import HTTPStatus
+from pathlib import Path
+
+DASHSCOPE_API_KEY_ENV = 'DASHSCOPE_API_KEY'
+DASHSCOPE_API_KEY_FILE_PATH_ENV = 'DASHSCOPE_API_KEY_FILE_PATH'
+DASHSCOPE_API_REGION_ENV = 'DASHSCOPE_API_REGION'
+DASHSCOPE_API_VERSION_ENV = 'DASHSCOPE_API_VERSION'
+# to disable data inspection
+# export DASHSCOPE_DISABLE_DATA_INSPECTION=true
+DASHSCOPE_DISABLE_DATA_INSPECTION_ENV = 'DASHSCOPE_DISABLE_DATA_INSPECTION'
+DEFAULT_DASHSCOPE_CACHE_PATH = Path.home().joinpath('.dashscope')
+DEFAULT_DASHSCOPE_API_KEY_FILE_PATH = Path.joinpath(
+    DEFAULT_DASHSCOPE_CACHE_PATH, 'api_key')
+
+DEFAULT_REQUEST_TIMEOUT_SECONDS = 300
+REQUEST_TIMEOUT_KEYWORD = 'request_timeout'
+SERVICE_API_PATH = 'services'
+DASHSCOPE_LOGGING_LEVEL_ENV = 'DASHSCOPE_LOGGING_LEVEL'
+# task config keys.
+PROMPT = 'prompt'
+MESSAGES = 'messages'
+NEGATIVE_PROMPT = 'negative_prompt'
+HISTORY = 'history'
+CUSTOMIZED_MODEL_ID = 'customized_model_id'
+IMAGES = 'images'
+TEXT_EMBEDDING_INPUT_KEY = 'texts'
+SERVICE_503_MESSAGE = 'Service temporarily unavailable, possibly overloaded or not ready.'  # noqa E501
+WEBSOCKET_ERROR_CODE = 44
+SSE_CONTENT_TYPE = 'text/event-stream'
+DEPRECATED_MESSAGE = 'history and auto_history are deprecated for qwen serial models and will be remove in future, use messages'  # noqa E501
+SCENE = 'scene'
+MESSAGE = 'message'
+REQUEST_CONTENT_TEXT = 'text'
+REQUEST_CONTENT_IMAGE = 'image'
+REQUEST_CONTENT_AUDIO = 'audio'
+FILE_PATH_SCHEMA = 'file://'
+
+ENCRYPTION_AES_SECRET_KEY_BYTES = 32
+ENCRYPTION_AES_IV_LENGTH = 12
+
+REPEATABLE_STATUS = [
+    HTTPStatus.SERVICE_UNAVAILABLE, HTTPStatus.GATEWAY_TIMEOUT
+]
+
+
+class FilePurpose:
+    fine_tune = 'fine_tune'
+    assistants = 'assistants'
+
+
+class DeploymentStatus:
+    DEPLOYING = 'DEPLOYING'
+    SERVING = 'RUNNING'
+    DELETING = 'DELETING'
+    FAILED = 'FAILED'
+    PENDING = 'PENDING'
+
+
+class ApiProtocol:
+    WEBSOCKET = 'websocket'
+    HTTP = 'http'
+    HTTPS = 'https'
+
+
+class HTTPMethod:
+    GET = 'GET'
+    HEAD = 'HEAD'
+    POST = 'POST'
+    PUT = 'PUT'
+    DELETE = 'DELETE'
+    CONNECT = 'CONNECT'
+    OPTIONS = 'OPTIONS'
+    TRACE = 'TRACE'
+    PATCH = 'PATCH'
+
+
+class TaskStatus:
+    PENDING = 'PENDING'
+    SUSPENDED = 'SUSPENDED'
+    SUCCEEDED = 'SUCCEEDED'
+    CANCELED = 'CANCELED'
+    RUNNING = 'RUNNING'
+    FAILED = 'FAILED'
+    UNKNOWN = 'UNKNOWN'
+
+
+class Tasks(object):
+    TextGeneration = 'text-generation'
+    AutoSpeechRecognition = 'asr'