Fix signature of Choices member creation, add assert_type test cases, run pyright

django-stubs/db/models/enums.pyi

@@ -1,8 +1,10 @@
 import enum
 import sys
-from typing import Any, TypeVar, type_check_only
+from typing import Any, TypeVar, overload, type_check_only
 
-from typing_extensions import Self, TypeAlias
+from _typeshed import ConvertibleToInt
+from django.utils.functional import _StrOrPromise
+from typing_extensions import TypeAlias
 
 _Self = TypeVar("_Self")
 
@@ -56,7 +58,10 @@ class _IntegerChoicesMeta(ChoicesType):
     def values(self) -> list[int]: ...
 
 class IntegerChoices(Choices, IntEnum, metaclass=_IntegerChoicesMeta):
-    def __new__(cls, value: int) -> Self: ...
+    @overload
+    def __init__(self, x: ConvertibleToInt) -> None: ...
+    @overload
+    def __init__(self, x: ConvertibleToInt, label: _StrOrPromise) -> None: ...
     @_enum_property
     def value(self) -> int: ...
 
@@ -69,6 +74,9 @@ class _TextChoicesMeta(ChoicesType):
     def values(self) -> list[str]: ...
 
 class TextChoices(Choices, StrEnum, metaclass=_TextChoicesMeta):
-    def __new__(cls, value: str | tuple[str, str]) -> Self: ...
+    @overload
+    def __init__(self, object: str) -> None: ...
+    @overload
+    def __init__(self, object: str, label: _StrOrPromise) -> None: ...
     @_enum_property
     def value(self) -> str: ...