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/jsonschema/benchmarks/issue232.py

@@ -0,0 +1,25 @@
+"""
+A performance benchmark using the example from issue #232.
+
+See https://github.com/python-jsonschema/jsonschema/pull/232.
+"""
+from pathlib import Path
+
+from pyperf import Runner
+from referencing import Registry
+
+from jsonschema.tests._suite import Version
+import jsonschema
+
+issue232 = Version(
+    path=Path(__file__).parent / "issue232",
+    remotes=Registry(),
+    name="issue232",
+)
+
+
+if __name__ == "__main__":
+    issue232.benchmark(
+        runner=Runner(),
+        Validator=jsonschema.Draft4Validator,
+    )