Minor ML Update: Prevent duplicate plugin actions

When a plugin action runs in the background (e.g. creating a record or sending a confirmation), Moveworks briefly pauses the model while it waits for the result. On GPT-5.4, that pause could sometimes cause the model to run the same action a second time instead of waiting — creating duplicate side effects. We rewrote the instruction the model receives during that wait so it clearly understands the result is still coming and should not retry.