refactor: Improve handling of custom network aliases

The custom_network_aliases attribute in the Application model was being cast to an array directly. This commit refactors the attribute to provide both a string representation (for compatibility with older configurations and hashing) and an array representation for internal use. This ensures that network aliases are correctly parsed and utilized, preventing potential issues during deployment and configuration updates.

bootstrap/helpers/api.php

@@ -97,6 +97,7 @@ function sharedDataApplications()
         'start_command' => 'string|nullable',
         'ports_exposes' => 'string|regex:/^(\d+)(,\d+)*$/',
         'ports_mappings' => 'string|regex:/^(\d+:\d+)(,\d+:\d+)*$/|nullable',
+        'custom_network_aliases' => 'string|nullable',
         'base_directory' => 'string|nullable',
         'publish_directory' => 'string|nullable',
         'health_check_enabled' => 'boolean',