Changelog
- 5ad50e0 Hash frontier dedup key to fixed width to prevent long-URL data loss
- ec0010b Merge fix/v0.4.1: dedup-key hashing, shard ceiling, doc fixes
- 692b022 Promote CHANGELOG to 0.4.1
- 5ff9bc7 Reconcile pre-0.4.1 frontier dedup_key on mysql/postgres upgrade
- a703fc2 Reject worker.count beyond the host-shard space; fix stale docs