4.4.1

Fixed

• Pool checkout no longer fails with checkout_timeout when a connection from a just-completed request has not yet been checked back in. pool_size / max_connections now bounds the warm (idle) pool kept for reuse; per-host concurrency is capped by max_per_host. A request beyond the warm pool size opens an overflow connection that is closed at checkin instead of being pooled. Set max_per_host to cap concurrent connections to a host.

Dependencies

• webtransport 0.4.0 -> ~> 0.4.1, h2 ~> 0.10.0 -> ~> 0.10.1, quic 1.6.5 -> ~> 1.6.5. The exact webtransport 0.4.0 pin required h2 0.9.0, conflicting with hackney's own h2 ~> 0.10.0 and breaking installation on strict resolvers. webtransport 0.4.1 relaxes that requirement; the ranges now accept any 0.4.x / 0.10.x / 1.6.x patch release without a further bump. (#879)