False positive incompatible override with *args + keyword-only param

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```
class A:
def test(self, x: int): ...

class B(A):
def test(self, *args: int, x: int = 1): ...

a: A = B()
a.test(1)
a.test(x=1)
```

The following snippet gives the error "base parameter "x" is keyword parameter, override parameter is position-only"

However, as shown from the last 2 lines, the two possible ways to call `A.test` are valid at runtime for `B.test`.

Start by running the reported A and B example through Pyright and confirm the incompatible-override diagnostic. Trace the override compatibility check for *args and keyword-only parameters; done means both shown calls are accepted while genuinely incompatible overrides remain diagnosed.

Written by the indexing model from the issue text.