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/websocket/_logging.py

@@ -0,0 +1,106 @@
+import logging
+
+"""
+_logging.py
+websocket - WebSocket client library for Python
+
+Copyright 2025 engn33r
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+"""
+
+_logger = logging.getLogger("websocket")
+try:
+    from logging import NullHandler
+except ImportError:
+
+    class NullHandler(logging.Handler):  # type: ignore[no-redef]
+        def emit(self, record) -> None:
+            pass
+
+
+_logger.addHandler(NullHandler())
+
+_traceEnabled = False
+
+__all__ = [
+    "enableTrace",
+    "dump",
+    "error",
+    "warning",
+    "debug",
+    "trace",
+    "isEnabledForError",
+    "isEnabledForDebug",
+    "isEnabledForTrace",
+]
+
+
+def enableTrace(
+    traceable: bool,
+    handler: logging.StreamHandler = logging.StreamHandler(),
+    level: str = "DEBUG",
+) -> None:
+    """
+    Turn on/off the traceability.
+
+    Parameters
+    ----------
+    traceable: bool
+        If set to True, traceability is enabled.
+    """
+    global _traceEnabled
+    _traceEnabled = traceable
+    if traceable:
+        _logger.addHandler(handler)
+        _logger.setLevel(getattr(logging, level))
+
+
+def dump(title: str, message: str) -> None:
+    if _traceEnabled:
+        _logger.debug(f"--- {title} ---")
+        _logger.debug(message)
+        _logger.debug("-----------------------")
+
+
+def error(msg: str) -> None:
+    _logger.error(msg)
+
+
+def warning(msg: str) -> None:
+    _logger.warning(msg)
+
+
+def debug(msg: str) -> None:
+    _logger.debug(msg)
+
+
+def info(msg: str) -> None:
+    _logger.info(msg)
+
+
+def trace(msg: str) -> None:
+    if _traceEnabled:
+        _logger.debug(msg)
+
+
+def isEnabledForError() -> bool:
+    return _logger.isEnabledFor(logging.ERROR)
+
+
+def isEnabledForDebug() -> bool:
+    return _logger.isEnabledFor(logging.DEBUG)
+
+
+def isEnabledForTrace() -> bool:
+    return _traceEnabled