v0.3.2

Performance

• Migration 6 adds covering indexes for per-author activity over a date
  window: pull requests opened (with additions, deletions and changed files),
  reviews submitted, and review comments written. Callers that count these
  per author (user metrics, leaderboards, or their own SQL over the
  warehouse) no longer read the full rows. On a 16 GB test warehouse, counts
  for a dozen authors went from seconds to milliseconds on a cold page cache.

Upgrade notes

• Like migration 5, migration 6 builds its indexes in one transaction the
  first time a warehouse is opened (tens of seconds on a large warehouse)
  and adds about 16 MB there. Binaries older than 0.3.2 refuse an upgraded
  warehouse.