pre merge con giacomo

src/app/markets/error_handler.py

@@ -14,6 +14,7 @@ from functools import wraps
 from typing import Any, Callable, Optional, Type, Union, List
 from requests.exceptions import RequestException, Timeout, ConnectionError
 from binance.exceptions import BinanceAPIException, BinanceRequestException
+from base import ProductInfo
 
 # Configurazione logging
 logger = logging.getLogger(__name__)
@@ -168,7 +169,7 @@ class ProviderFallback:
         method_name: str,
         *args,
         **kwargs
-    ) -> Any:
+    ) -> list[ProductInfo]:
         """
         Esegue un metodo su tutti i provider fino a trovarne uno che funziona.