Fix 2 tests in RQ Apify storage client

Author: vdusek

src/apify/storage_clients/_apify/_request_queue_client.py

@@ -215,7 +215,7 @@ async def get_request(self, request_id: str) -> Request | None:
         if response is None:
             return None
 
-        return Request.model_validate(**response)
+        return Request.model_validate(response)
 
     @override
     async def fetch_next_request(self) -> Request | None:
@@ -256,6 +256,15 @@ async def fetch_next_request(self) -> Request | None:
             )
             return None
 
+        # Use get request to ensure we have the full request object.
+        request = await self.get_request(request.id)
+        if request is None:
+            logger.debug(
+                'Request fetched from the beginning of queue was not found in the RQ',
+                extra={'nextRequestId': next_request_id},
+            )
+            return None
+
         return request
 
     @override