Pool has no shutdown story — items it created leak when the app stops

Pool has no shutdown story — items it created leak when the app stops: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm following the channel pooling pattern from the docs ( docs/source/examples/pooling.py ): one Pool produces AMQP connections, a second Pool…