WO

After "input_seq_no" add "target_sched_line_id" and "queue_seq_no" (both int32, nullable) to allow work orders to be queued to lines in a specific order. "queue_seq_no" will be null if "target_sched_line_id" is null. A set-null foreign key should be added from the new "target_sched_line_id" field to the line table, and if it causes "target_sched_line_id" to be set to null, "queue_seq_no" should also be set to null.