[BUG] CPU too high and memory to overflow

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Current Behavior

Hello, I've encountered a problem. When adding a large number of services, the system becomes overwhelmed, causing subsequent requests to time out and memory to overflow. Are there any good solutions?

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Environment

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HertzBeat version(s):
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### Debug logs

_No response_

### Anything else?

_No response_

The report names no files, tests, entry points, reproduction steps, or debug logs. First establish a reproducible case involving a large number of services and collect CPU, memory, and request-timeout evidence; done means the overload and memory exhaustion no longer occur under that case.

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