Mypy errors with user-defined parameter class

[starhel]

Description
The mypy plugin does not work with parameter classes that are user-defined rather than built into luigi. For example:

import luigi
from uuid import UUID


class UUIDParameter(luigi.Parameter):
    def parse(self, s):
        return UUID(s)


class DummyTask(luigi.Task):
    x: int = luigi.IntParameter()
    y: UUID = UUIDParameter()


dummy_task = DummyTask(x=10, y="9b0591d7-a167-4978-bc6d-41f7d84a288c")
reveal_type(dummy_task.x)
reveal_type(dummy_task.y)

main.py:12: error: Incompatible types in assignment (expression has type "UUIDParameter", variable has type "UUID")  [assignment]
main.py:15: error: Unexpected keyword argument "y" for "DummyTask"  [call-arg]
main.py:16: note: Revealed type is "builtins.int"
main.py:17: note: Revealed type is "uuid.UUID"

Revealed types are correct, but mypy gives 2 errors connected with custom parameter class.

Packages

lockfile==0.12.2
luigi==3.6.0
mypy==1.14.1
mypy-extensions==1.0.0
python-daemon==3.1.2
python-dateutil==2.9.0.post0
six==1.17.0
tenacity==8.5.0
tomli==2.2.1
tornado==6.4.2
typing_extensions==4.12.2