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/pyasn1_modules/rfc5916.py

@@ -0,0 +1,35 @@
+#
+# This file is part of pyasn1-modules software.
+#
+# Created by Russ Housley.
+#
+# Copyright (c) 2019, Vigil Security, LLC
+# License: http://snmplabs.com/pyasn1/license.html
+#
+# Device Owner Attribute
+#
+# ASN.1 source from:
+# https://www.rfc-editor.org/rfc/rfc5916.txt
+#
+
+from pyasn1.type import univ
+
+from pyasn1_modules import rfc5280
+
+
+# Device Owner Attribute
+
+id_deviceOwner = univ.ObjectIdentifier((2, 16, 840, 1, 101, 2, 1, 5, 69))
+
+at_deviceOwner = rfc5280.Attribute()
+at_deviceOwner['type'] = id_deviceOwner
+at_deviceOwner['values'][0] = univ.ObjectIdentifier()
+
+
+# Add to the map of Attribute Type OIDs to Attributes in rfc5280.py.
+
+_certificateAttributesMapUpdate = {
+    id_deviceOwner: univ.ObjectIdentifier(),
+}
+
+rfc5280.certificateAttributesMap.update(_certificateAttributesMapUpdate)