fix(01-01): correct CPT registration hook timing

- CPT init hook was being added from within parent init hook
- Changed to call register_post_type() directly from main init
- Removed redundant hook from CPT constructor
- Fixes CPT not registering on plugin activation

includes/class-cpt.php

@@ -32,7 +32,7 @@ class Umzugsliste_CPT {
 	 * Constructor
 	 */
 	private function __construct() {
-		add_action( 'init', array( $this, 'register_post_type' ) );
+		// CPT registration is called directly from main plugin init
 	}
 
 	/**

umzugsliste.php

@@ -65,8 +65,9 @@ class Umzugsliste {
 	 * Initialize plugin components
 	 */
 	public function init() {
-		// Initialize CPT
-		Umzugsliste_CPT::get_instance();
+		// Initialize and register CPT
+		$cpt = Umzugsliste_CPT::get_instance();
+		$cpt->register_post_type();
 
 		// Initialize admin menu
 		if ( is_admin() ) {