style: normalize python formatting gates

apps/api/main.py

@@ -1,12 +1,5 @@
 import os
 
-from fastapi import FastAPI
-from fastapi.exceptions import RequestValidationError
-from fastapi.middleware.cors import CORSMiddleware
-from fastapi.middleware.gzip import GZipMiddleware
-from starlette.exceptions import HTTPException as StarletteHTTPException
-from starlette.staticfiles import StaticFiles
-
 from app.api.router import api_router, health_router
 from app.config import settings
 from app.middleware.exceptions import (
@@ -17,6 +10,12 @@ from app.middleware.exceptions import (
     validation_exception_handler,
 )
 from app.middleware.logging import RequestLoggingMiddleware
+from fastapi import FastAPI
+from fastapi.exceptions import RequestValidationError
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.middleware.gzip import GZipMiddleware
+from starlette.exceptions import HTTPException as StarletteHTTPException
+from starlette.staticfiles import StaticFiles
 
 app = FastAPI(
     title="小虾 SaaS API",