v0.3.3

Performance

• Migration 7 adds fact_pull_requests(created_at DESC), so newest-first
  pull-request listings stop sorting the whole table: on a 16 GB test
  warehouse with nothing cached, the first page went from about 30 s to
  24 ms. The index is descending on purpose. Pull requests that share a
  created_at keep the order the old scan-and-sort returned.
• It also adds fact_pull_requests(author_key, created_date_key, repo_key, title), so per-author work lists over a date window (repository and title)
  read only the index.

Upgrade notes

• Migration 7 adds about 6 MB and builds in one transaction at first open.
  Binaries older than 0.3.3 refuse an upgraded warehouse.