chore: ruff lint 修复 + 第一优先级全部完成

src/server/app.py

@@ -1,20 +1,19 @@
 """FastAPI 服务层."""
+import logging
 import os
 import time
 import uuid
-import logging
+from contextlib import asynccontextmanager
 from pathlib import Path
 
-from contextlib import asynccontextmanager
-
-from fastapi import FastAPI, HTTPException, Depends, Request, Query
+from fastapi import Depends, FastAPI, HTTPException, Query, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import RedirectResponse
 from pydantic import BaseModel, Field, model_validator
 
 from src.core.security import is_path_within_workspace
-from src.server.auth import verify_api_key, rate_limiter
-from src.server.deps import get_state, AppState
+from src.server.auth import rate_limiter, verify_api_key
+from src.server.deps import AppState, get_state
 
 logger = logging.getLogger("md-vector-db")