I have done this for a customer in the past with the default convert task add-in. Everytime a drawing is released a note is added to the drawing. So, it's possible but it would take either using the API and creating your own add-in or using the custom scripting capability in the default convert task.
Hi Paul, there is a tool you can use called #TASK which is a tool for carrying out batch operations on SolidWorks file. Try the macro called "Insert Note"
You can see a How-to video on using #TASK here: #TASK - your very own SolidWorks assistant - YouTube
Hope this helps.