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/agile.py

@@ -0,0 +1,25 @@
+"""
+    pygments.lexers.agile
+    ~~~~~~~~~~~~~~~~~~~~~
+
+    Just export lexer classes previously contained in this module.
+
+    :copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+# ruff: noqa: F401
+
+from pygments.lexers.lisp import SchemeLexer
+from pygments.lexers.jvm import IokeLexer, ClojureLexer
+from pygments.lexers.python import PythonLexer, PythonConsoleLexer, \
+    PythonTracebackLexer, Python3Lexer, Python3TracebackLexer, DgLexer
+from pygments.lexers.ruby import RubyLexer, RubyConsoleLexer, FancyLexer
+from pygments.lexers.perl import PerlLexer, Perl6Lexer
+from pygments.lexers.d import CrocLexer, MiniDLexer
+from pygments.lexers.iolang import IoLexer
+from pygments.lexers.tcl import TclLexer
+from pygments.lexers.factor import FactorLexer
+from pygments.lexers.scripting import LuaLexer, MoonScriptLexer
+
+__all__ = []