Status reads add review requests, latest reviews, closing issue
references, and whether the viewer may update or rebase the head.
Viewed files are read through the files listing, bounded by the new
maxViewedFiles, and set with markFileAsViewed or unmarkFileAsViewed after
a head check. Failed GitHub Actions runs are rerun through the REST API,
reviews are requested with requestReviewsByLogin, and branches are
updated with expectedHeadOid. Every mutation goes through the sender
review writes use, now in mutation.ts.
