fix(broker): change the call of broker.kick from send to send_and_wait

[shihaoH]

Summary

• Replace AIOKafkaProducer.send with send_and_wait inside AioKafkaBroker.kick.
• Ensures the broker call completes only after the producer receives broker ack or raises (timeouts/auth/SSL), instead of silently succeeding after buffering.

Why

Currently kick uses send, which enqueues to the local buffer and returns immediately; transport-level failures are not propagated, so middlewares may mark messages as sent even when the broker rejected them. send_and_wait follows the aiokafka recommended pattern and surfaces real send outcomes.

Reference

aiokafka docs: https://aiokafka.readthedocs.io/en/stable/producer.html

fixes: #8