How many of failures are engaged-issue lookups that failed (#1862),
as opposed to comment fetches. A lookup failure means an engaged issue
was not checked at all this run, so the dashboard names it separately.
Non-fatal problems for the run's warning channel: a claimed or open-PR issue that is gone, a comment thread too long to read to the end, an engagement time that does not parse, engaged issues with new activity left unread because the comment-fetch cap bit. Each means the result may be missing or misreporting something the user can act on.
Per-issue failures: the batched lookup of an engaged issue the search missed (the first
lookupFailuresentries), then the comment fetches and analyses that threw.