[ews-app] Save github comment_id to database and retrieve it appropriately
Pull request: https://github.com/WebKit/WebKit/pull/2901
Committed 253000@main (3d75958bc36b): <https://commits.webkit.org/253000@main> Reviewed commits have been landed. Closing PR #2901 and removing active labels.
<rdar://problem/97920874>