Feature: message pressure test and reliability test code for server and sdk

[wangchuxiao-dev]

Checklist

• [X] I've searched for similar issues and couldn't find anything matching
• [X] I've discussed this feature request in the OpenIMSDK Slack and got positive feedback

Is this feature request related to a problem?

None

Problem Description

Feature: message pressure test and reliability test code for server and sdk

Solution Description

Feature: message pressure test and reliability test code for server and sdk

Benefits

Feature: message pressure test and reliability test code for server and sdk

Potential Drawbacks

No response

Additional Information

No response