Updated BrokerMetadata#nodeId type from int to int | str. (#1051)

* Updated BrokerMetadata#nodeId type from int to (int | str).

* FIXME.

* Unused import.

* Include issue link in FIXME.

* Fix linter errors

---------

Co-authored-by: Denis Otkidach <denis.otkidach@gmail.com>

aiokafka/structs.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from collections.abc import Sequence
 from dataclasses import dataclass
 from typing import Generic, NamedTuple, Optional, TypeVar
@@ -27,7 +29,8 @@ class TopicPartition(NamedTuple):
 class BrokerMetadata(NamedTuple):
     """A Kafka broker metadata used by admin tools"""
 
-    nodeId: int
+    # FIXME: consider updating implementation (https://github.com/aio-libs/aiokafka/issues/1050)
+    nodeId: int | str
     "The Kafka broker id"
 
     host: str