Disconnecting the debugger seems to freeze the Harper process

### Bug Summary

The debugger can sometimes cause Harper to seemingly freeze.

### Reproduction Repository (if applicable)

_No response_

### Steps to Reproduce

1. Create a basic `resources.js` with `jsResource` application
2. Set a breakpoint
3. Install Harper in dev mode (ensure `threads.debug: true`) and run the application
4. Attach a debugger
5. Run a request that causes the debugger to break
6. Continue the debugger and let the request complete
7. Disconnect the debugger
8. Witness Harper freeze or crash or something.

### Expected Behavior

I expect Harper process to return to normal.

### Actual Behavior

When this occurs, the Harper process doesn't exit. Additional requests hang. Trying to exit the process with CTRL+C doesn't work. I'm not sure what is frozen or failing, but its definitely not working!

If you try `harper stop` or `harper status` in a separate process they'll say they cannot find `hdb.pid` and that harper is "stopped", except if you query `localhost:9926` it'll hang. So there must be some phantom process/thread situation going on?

### Platform

_No response_

### Console Errors

_No response_

### Screenshots or Videos

_No response_

### Additional Context

_No response_

### Are you planning to fix this issue?

No, just reporting the issue

### First-time contributor support

- [ ] I'm new to contributing and would appreciate guidance on the process
- [ ] I'd like help understanding the project structure
- [ ] I need assistance with setting up the development environment
- [ ] I'm comfortable contributing, but new to this project specifically