fix(lint): tri des imports dans backend/routers/coffres.py (I001)

backend/routers/coffres.py

@@ -34,10 +34,10 @@ from __future__ import annotations
 import logging
 import os
 
-from backend.auth.middleware import require_admin, require_auth
 from fastapi import APIRouter, Body, Depends, HTTPException, Request
 
 from backend.audit import get_recent_entries, log_coffre_event
+from backend.auth.middleware import require_admin, require_auth
 from backend.coffre_crypto import (
     CryptoIndisponibleError,
     KEKAbsenteError,