[Enhancement] Increase timeout for broker notification requests to 3000 milliseconds

### Before Creating the Enhancement Request

- [x] I have confirmed that this should be classified as an enhancement rather than a bug/feature.

### Summary

### Motivation

Increase timeout for broker notification requests to 3000 milliseconds

### Describe the Solution You'd Like

Increase timeout for broker notification requests to 3000 milliseconds

### Describe Alternatives You've Considered

too small

### Additional Context

_No response_

Start by locating the broker notification request timeout in the RocketMQ source and identify any tests covering that request path. Confirm which timeout is currently configured and update the relevant coverage so done means broker notification requests allow 3000 milliseconds.

Written by the indexing model from the issue text.