create_flow_run_from_deployment breaks with default state parameter for Pydantic >=2.10

[nithinkrishnamurthi]

Bug summary

If no state variable is provided, Prefect will automatically call prefect.states.Scheduled(). For whatever reason, this function call will result in a model validation error starting in Pydantic 2.10.

Traceback (most recent call last):
File "/home/ubuntu/prefect-poc/perf/test.py", line 153, in
asyncio.run(run_deployments())
File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run
return loop.run_until_complete(main)
File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
return future.result()
File "/home/ubuntu/prefect-poc/perf/test.py", line 138, in run_deployments
scheduled_state = prefect.states.Scheduled()
File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/states.py", line 608, in Scheduled
return cls(type=StateType.SCHEDULED, state_details=state_details, **kwargs)
File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/pydantic/main.py", line 214, in init
validated_self = self.pydantic_validator.validate_python(data, self_instance=self)
File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/pydantic/_internal/_mock_val_ser.py", line 100, in getattr
raise PydanticUserError(self._error_message, code=self._code)
pydantic.errors.PydanticUserError: State is not fully defined; you should define all referenced types, then call State.model_rebuild().

Version info

Version:             3.1.4
API version:         0.8.4
Python version:      3.10.12
Git commit:          78ee41cb
Built:               Wed, Nov 20, 2024 7:37 PM
OS/Arch:             linux/x86_64
Profile:             local
Server type:         server
Pydantic version:    2.10.0
Integrations:
  prefect-ray:       0.4.3

Additional context

No response

[zzstoatzz]

hi @nithinkrishnamurthi - thank you for the issue! I'm going to close this as a duplicate of #15957

this is related to #16387

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please let us know if you think is not the same issue!