Replace MINUTE_IN_SECONDS constant with 900

Co-authored-by: JJJ <[email protected]>

Author: Copilot

src/Database/Table.php

@@ -357,9 +357,9 @@ public function create_lock() {
 
 		// Create the lock transient
 		if ( $this->is_global() ) {
-			$lock_set = set_site_transient( $lock_key, time(), 15 * MINUTE_IN_SECONDS );
+			$lock_set = set_site_transient( $lock_key, time(), 900 );
 		} else {
-			$lock_set = set_transient( $lock_key, time(), 15 * MINUTE_IN_SECONDS );
+			$lock_set = set_transient( $lock_key, time(), 900 );
 		}
 
 		// Return whether the lock was successfully created