Rescue Paperjet v1 implementation

backend/app/auth/rate_limit.py

@@ -2,6 +2,7 @@
 
 import time
 from collections import defaultdict
+
 from fastapi import HTTPException
 
 from app.config import settings
@@ -27,7 +28,7 @@ def check_rate_limit(ip: str) -> None:
             detail=f"Too many failed attempts. Try again in {remaining} seconds.",
             headers={"Retry-After": str(remaining)},
         )
-    
+
     # If lockout has expired, reset
     if record["lockout_until"] > 0 and record["lockout_until"] <= now:
         record["attempts"] = 0