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/chromadb/cli/cli.py

@@ -0,0 +1,56 @@
+import re
+import sys
+
+import chromadb_rust_bindings
+import requests
+from packaging.version import parse
+
+import chromadb
+
+
+def build_cli_args(**kwargs):
+    args = []
+    for key, value in kwargs.items():
+        if isinstance(value, bool):
+            if value:
+                args.append(f"--{key}")
+        elif value is not None:
+            args.extend([f"--{key}", str(value)])
+    return args
+
+
+def update():
+    try:
+        url = f"https://api.github.com/repos/chroma-core/chroma/releases"
+        response = requests.get(url)
+        response.raise_for_status()
+        releases = response.json()
+
+        version_pattern = re.compile(r'^\d+\.\d+\.\d+$')
+        numeric_releases = [r["tag_name"] for r in releases if version_pattern.fullmatch(r["tag_name"])]
+
+        if not numeric_releases:
+            print("Couldn't fetch the latest Chroma version")
+            return
+
+        latest = max(numeric_releases, key=parse)
+        if latest == chromadb.__version__:
+            print("Your Chroma version is up-to-date")
+            return
+
+        print(
+            f"A new version of Chroma is available!\nIf you're using pip, run 'pip install --upgrade chromadb' to upgrade to version {latest}")
+
+    except Exception as e:
+        print("Couldn't fetch the latest Chroma version")
+
+
+def app():
+    args = sys.argv
+    if ["chroma", "update"] in args:
+        update()
+        return
+    try:
+        chromadb_rust_bindings.cli(args)
+    except KeyboardInterrupt:
+        pass