__repr__ for FirewallResourceLabelSelector broken because of missing __api_properties__

[scy]

Bug Report

Current Behavior
Calling repr() on a FirewallResourceLabelSelector instance throws an AttributeError because the class inherits from BaseDomain (and thus comes with BaseDomain.__repr__), but does not have an __api_properties__ field.

Input Code

$ uv run --with hcloud==2.5.0 python
Python 3.13.1 (main, Dec 19 2024, 14:32:25) [Clang 18.1.8 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import hcloud
>>> selector = hcloud.firewalls.FirewallResourceLabelSelector("answer=42")
>>> selector
Traceback (most recent call last):
  File "<python-input-2>", line 1, in <module>
    selector
  File "/home/scy/.cache/uv/archive-v0/0e_aaDu7yChGLL8FNzh-C/lib/python3.13/site-packages/hcloud/core/domain.py", line 18, in __repr__
    kwargs = [f"{key}={getattr(self, key)!r}" for key in self.__api_properties__]  # type: ignore[var-annotated]
                                                         ^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'FirewallResourceLabelSelector' object has no attribute '__api_properties__'
>>> 

Expected behavior/code
Something like FirewallResourceLabelSelector(selector="answer=42").

Environment

• Python Version: 3.13.1
• Hcloud-Python Version: 2.5.0

Possible Solution

1. Implement __api_properties__ on the class.
2. Introduce some static analysis to catch issues like these.

[scy]

Until this is fixed, the following monkey patch can be used:

import hcloud

hcloud.firewalls.FirewallResourceLabelSelector.__api_properties__ = ("selector",)

[jooola]

Hey, thanks a lot for the bug report.

I'll cut a patch release once #492 is merged.