RobinTail / express-zod-api / 28282117749

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fix(mem): Destroy and remove failed sockets by graceful monitoring (#3492)

This is supposed to handle broken sockets that emit `error` but do not
emit `close`, so that the `Set` won't grow.
This is an edge case.
Extracted from #3490 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Improved socket cleanup during graceful shutdown so tracked
connections are removed correctly even when a socket errors.
* Ensured errored sockets are destroyed and no longer linger in the
active socket set.
* **Tests**
* Added coverage for socket error handling during shutdown to verify
cleanup and shutdown complete successfully.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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