WebServer shutdown can raise TypeError while restoring Uvicorn signal handlers

[manideeppranavm]

Description

Description

RocketRide server shutdown/restart can raise a Uvicorn signal-handler restoration error:

Observed Stack
ai/eaas.py
  main()
  asyncio.run(run())

ai/eaas.py
  await server.serve()

ai/web/server.py
  await self.server.serve()

uvicorn/server.py
  with self.capture_signals()

uvicorn/server.py
  signal.signal(sig, handler)

python3.12/signal.py
  TypeError

TypeError: signal handler must be signal.SIG_IGN, signal.SIG_DFL, or a callable object```

The server can restart successfully afterward, but during the restart/shutdown path is noisy with the signal exceptions.



### Steps to Reproduce

This appears during RocketRide normal server shutdown/restart, not during normal pipeline node execution.



### Expected vs Actual Behavior

Expected Behavior
Server shutdown/restart should complete cleanly without raising a signal restoration exception.

Actual Behavior
During shutdown/restart, Uvicorn attempts to restore a saved signal handler value that Python rejects because it is not SIG_IGN, SIG_DFL, or callable.

### Severity

P3 - Low (minor inconvenience)

### Platform

- [ ] Windows
- [ ] macOS
- [ ] Linux

### Version / Environment

_No response_

### Screenshots / Logs

_No response_

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