Model printing requires the output of the primary key value

Is your feature request related to a problem? Please describe.
When I print a model,I can only got model's name.
The str function should have the same logic as the repr function.
In the past, every time I printed a model, I had to print an extra pk field.
Describe alternatives you've considered
Rewrite the Model's function:str
like:

class Model(metaclass=ModelMeta):
    """
    Base class for all Tortoise ORM Models.
    """
    ...

    def __str__(self) -> str:
        if self.pk:
            return f"<{self.__class__.__name__}: {self.pk}>"
        return f"<{self.__class__.__name__}>"

Start at the Model class and compare its current str behavior with repr. Verify the requested output for models with and without a primary-key value, and consider whether existing model representation tests cover both cases; done means printing includes the model name and, when present, its primary key.