017 fix returning all tariffs

app/adapters/delivery_providers/base.py

@@ -10,8 +10,8 @@ class DeliveryProvider(ABC):
     name: str
 
     @abstractmethod
-    async def get_price(self, request: DeliveryRequest) -> DeliveryPrice:
-        """Fetch one quote from an external provider."""
+    async def get_prices(self, request: DeliveryRequest) -> list[DeliveryPrice]:
+        """Fetch provider tariffs for a delivery request."""
 
         raise NotImplementedError