Fix callable type error by changing range helper methods from private to protected

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>

Author: Copilot

src/Comment_Command.php

@@ -802,7 +802,7 @@ public function exists( $args ) {
 	 * @param int|null $end   End of the ID range (inclusive), or null for no upper bound.
 	 * @return int[] List of existing comment IDs.
 	 */
-	private function get_comment_ids_in_range( int $start, ?int $end ): array {
+	protected function get_comment_ids_in_range( int $start, ?int $end ): array {
 		global $wpdb;
 
 		if ( null === $end ) {

src/Post_Command.php

@@ -1251,7 +1251,7 @@ private function maybe_convert_hyphenated_date_format( $date_string ) {
 	 * @param int|null $end   End of the ID range (inclusive), or null for no upper bound.
 	 * @return int[] List of existing post IDs.
 	 */
-	private function get_post_ids_in_range( int $start, ?int $end ): array {
+	protected function get_post_ids_in_range( int $start, ?int $end ): array {
 		global $wpdb;
 
 		if ( null === $end ) {

src/Site_Command.php

@@ -1490,7 +1490,7 @@ private function check_site_ids_and_slug( $args, $assoc_args ) {
 	 * @param int|null $end   End of the ID range (inclusive), or null for no upper bound.
 	 * @return int[] List of existing site IDs.
 	 */
-	private function get_site_ids_in_range( int $start, ?int $end ): array {
+	protected function get_site_ids_in_range( int $start, ?int $end ): array {
 		global $wpdb;
 
 		if ( null === $end ) {

src/Term_Command.php

@@ -918,7 +918,7 @@ private function get_formatter( &$assoc_args ) {
 	 * @param int|null $end      End of the ID range (inclusive), or null for no upper bound.
 	 * @return int[] List of existing term IDs.
 	 */
-	private function get_term_ids_in_range( string $taxonomy, int $start, ?int $end ): array {
+	protected function get_term_ids_in_range( string $taxonomy, int $start, ?int $end ): array {
 		global $wpdb;
 
 		if ( null === $end ) {

src/User_Command.php

@@ -1562,7 +1562,7 @@ public function check_password( $args, $assoc_args ) {
 	 * @param int|null $end   End of the ID range (inclusive), or null for no upper bound.
 	 * @return int[] List of existing user IDs.
 	 */
-	private function get_user_ids_in_range( int $start, ?int $end ): array {
+	protected function get_user_ids_in_range( int $start, ?int $end ): array {
 		global $wpdb;
 
 		if ( null === $end ) {