[Bug] Error updating data: 'NoneType' object has no attribute 'astimezone'

### Short summary 📝 Integration suddenly stopped working altogether, due to a NoneType object ### Detailed description 📋 Discovered that the integration no longer provides any sensors. Tried updating Home Assistant, which made no difference. I'm guessing a previous update of Home Assistant broke this integration. It seems like `event_time` is no longer getting fetched, and becomes a `NoneType` object which breaks the integration. ### Version 📌 0.2.2 ### Environment 🌐 | Installation method | Home Assistant OS | |---------------------|-------------------| | Core | 2025.12.5 | | Supervisor | 2025.12.3 | | Operating System | 16.3 | | Frontend | 20251203.3 | ### Logs and screenshots 📂 ``` Traceback (most recent call last): File "/config/custom_components/lunar_phase/coordinator.py", line 38, in _async_update_data attributes = await self.hass.async_add_executor_job( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ self.moon_calc.get_moon_attributes ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run result = self.fn(*self.args, **self.kwargs) File "/config/custom_components/lunar_phase/moon.py", line 169, in get_moon_attributes STATE_ATTR_NEXT_RISE: self.get_event_time("rise"), ~~~~~~~~~~~~~~~~~~~^^^^^^^^ File "/config/custom_components/lunar_phase/moon.py", line 111, in get_event_time return event_time.astimezone(config_timezone) ^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'NoneType' object has no attribute 'astimezone' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 419, in _async_refresh self.data = await self._async_update_data() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/config/custom_components/lunar_phase/coordinator.py", line 47, in _async_update_data raise UpdateFailed(f"Error updating data: {err}") from err homeassistant.helpers.update_coordinator.UpdateFailed: Error updating data: 'NoneType' object has no attribute 'astimezone' The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/config/custom_components/lunar_phase/__init__.py", line 43, in async_setup_entry await coordinator.async_config_entry_first_refresh() File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 318, in async_config_entry_first_refresh await self._async_config_entry_first_refresh() File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 352, in _async_config_entry_first_refresh raise ex homeassistant.exceptions.ConfigEntryNotReady: Error updating data: 'NoneType' object has no attribute 'astimezone' ```