Fix asyncio event loop error in QueuedRequest dataclass

app.py

@@ -90,7 +90,8 @@ class QueuedRequest:
     id: str
     priority: int = 0  # Higher = more priority
     created_at: float = field(default_factory=time.time)
-    future: asyncio.Future = field(default_factory=lambda: asyncio.get_event_loop().create_future())
+    # Note: Future is created at runtime, not at class definition
+    future: Optional[asyncio.Future] = None
 
 class RequestQueue:
     def __init__(self, max_concurrent: int = 1, max_queue_size: int = 50):