The `is_array` check for `custom_network_aliases_array` was too strict and could lead to issues when the value was an empty string or null. This commit changes the check to `!empty()` for more robust handling.
Additionally, the unit tests for `custom_network_aliases` have been refactored to directly use the `Application::isConfigurationChanged()` method. This provides a more accurate and integrated test of the configuration change detection logic, rather than relying on a manual hash calculatio
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