0917 upgrade esockd to 5.9.7

[zmstone]

Fixes EMQX-10952

Summary

🤖 Generated by Copilot at 20b72e1

This pull request updates the esockd dependency to improve the handling and reporting of connection errors, and adds a new field shutdown_count to the shutdown reason map in emqx_channel. It also adds release notes for the changes in changes/ce/fix-11623.en.md.

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• Added tests for the changes
• Added property-based tests for code which performs user input validation
• Changed lines covered in coverage report
• Change log has been added to changes/(ce|ee)/(feat|perf|fix)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• Created PR to emqx-docs if documentation update is required, or link to a follow-up jira ticket
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update