requests for a given set of teams/reviewers (making it trivial to
compute statistics), revamp the related doc event code to support this
by referencing the review request directly, add a reviewer overview
page with recent performance for each reviewer as well as
settings/unavailable periods. Fix some bugs and shuffle some of the
review code a bit around.
Finish the importer from the previous Perl-based review tool,
importing log entries, figuring out whether a given review is
early/telechat/last call and fixing corner cases.
- Legacy-Id: 12080