3.31.4

• Fixed async QuerySessionPool permanently losing a pool slot when acquire() was cancelled while a new session was being created: asyncio.CancelledError no longer leaks the pool size counter, so a pool under deadline-driven cancellations can no longer end up exhausted and blocking forever. A cancelled or interrupted session attach now also closes the session instead of orphaning it server-side

Full Changelog: 3.31.3...3.31.4