Mark AS migration pending when updating WC to ensure migration happens.

Ideally https://github.com/woocommerce/action-scheduler/pull/470 should take care of this issue, but since we have AS 3.x in the wild without fix in the PR, this change is also necessary.

includes/class-wc-install.php

@@ -146,6 +146,7 @@ class WC_Install {
 			'wc_update_product_lookup_tables',
 			'wc_update_400_increase_size_of_column',
 			'wc_update_400_db_version',
+			'wc_reset_action_scheduler_migration_status',
 		),
 	);
 

includes/wc-update-functions.php

@@ -2091,6 +2091,13 @@ function wc_update_400_increase_size_of_column() {
 	$wpdb->query( "ALTER TABLE {$wpdb->prefix}wc_product_meta_lookup MODIFY COLUMN `max_price` decimal(19,4) NULL default NULL" );
 }
 
+/**
+ * Reset ActionScheduler migration status. Needs AS >= 3.0 shipped with WC >= 4.0.
+ */
+function wc_reset_action_scheduler_migration_status() {
+	\ActionScheduler_DataController::mark_migration_incomplete();
+}
+
 /**
  * Update DB version.
  */