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/pygments/lexers/gcodelexer.py

@@ -0,0 +1,35 @@
+"""
+    pygments.lexers.gcodelexer
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexers for the G Code Language.
+
+    :copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pygments.lexer import RegexLexer, bygroups
+from pygments.token import Comment, Name, Text, Keyword, Number
+
+__all__ = ['GcodeLexer']
+
+
+class GcodeLexer(RegexLexer):
+    """
+    For gcode source code.
+    """
+    name = 'g-code'
+    aliases = ['gcode']
+    filenames = ['*.gcode']
+    url = 'https://en.wikipedia.org/wiki/G-code'
+    version_added = '2.9'
+
+    tokens = {
+        'root': [
+            (r';.*\n', Comment),
+            (r'^[gmGM]\d{1,4}\s', Name.Builtin),  # M or G commands
+            (r'([^gGmM])([+-]?\d*[.]?\d+)', bygroups(Keyword, Number)),
+            (r'\s', Text.Whitespace),
+            (r'.*\n', Text),
+        ]
+    }