If an application has a character limit, just shorten your article summary so it fits. I always had a long and shortened summary ready. I think the article summary is more of just another hoop to jump through. Of my 5 interviews, I was never asked about my journal summary.

BUT if you are reapplying, make sure you do a new journal article summary. Some of the colleges recognize summaries that have already been submitted. Resubmitting an old summary makes you look like a lazy applicant. Good luck.