EWS app does not really need to store the patch content. It can simply fetch it from bugzilla and relay it to Buildbot, without saving to database. In case the patch content is required, it can be fetched from Bugzilla.
Created attachment 355151 [details] Proposed patch
Committed r238517: <https://trac.webkit.org/changeset/238517>
<rdar://problem/46255123>