Initialize Scheduler before Migration to ensure hooks are registered (#2771)

Author: pfefferle

.github/changelog/2771-from-description

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Fix migration activities not being scheduled for federation due to hook registration timing.

activitypub.php

@@ -85,7 +85,8 @@ function plugin_init() {
 	\add_action( 'init', array( __NAMESPACE__ . '\Options', 'init' ) );
 	\add_action( 'init', array( __NAMESPACE__ . '\Post_Types', 'init' ) );
 	\add_action( 'init', array( __NAMESPACE__ . '\Router', 'init' ) );
-	\add_action( 'init', array( __NAMESPACE__ . '\Scheduler', 'init' ) );
+	// Priority 0 ensures Scheduler hooks are registered before Migration (priority 1) runs.
+	\add_action( 'init', array( __NAMESPACE__ . '\Scheduler', 'init' ), 0 );
 	\add_action( 'init', array( __NAMESPACE__ . '\Search', 'init' ) );
 	\add_action( 'init', array( __NAMESPACE__ . '\Signature', 'init' ) );
 

includes/class-scheduler.php

@@ -274,9 +274,9 @@ public static function cleanup_remote_actors() {
 	 * Schedule the outbox item for federation.
 	 *
 	 * @param int $id     The ID of the outbox item.
-	 * @param int $offset The offset to add to the scheduled time.
+	 * @param int $offset The offset to add to the scheduled time. Default 3 seconds.
 	 */
-	public static function schedule_outbox_activity_for_federation( $id, $offset = 0 ) {
+	public static function schedule_outbox_activity_for_federation( $id, $offset = 3 ) {
 		$hook = 'activitypub_process_outbox';
 		$args = array( $id );