[ews] Improve logging in case of an exception in ews django app. We should print the stack trace to help us easily debug the exception. It would help in debugging issues like https://bugs.webkit.org/show_bug.cgi?id=249236
<rdar://problem/103308150>
Pull request: https://github.com/WebKit/WebKit/pull/7558
Committed 257805@main (735a7dc89754): <https://commits.webkit.org/257805@main> Reviewed commits have been landed. Closing PR #7558 and removing active labels.