fix pyright type errors for Django version compatibility

- Use getattr() for ChoicesMeta to avoid static attr access on Django 5.0+ stubs
- Suppress call-arg errors on CheckConstraint(check=...) backward-compat branches (Django < 5.1)
- Suppress attr-defined error on connection.operators which is untyped in Django stubs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 2 people

src/django_enum/choices.py

@@ -25,7 +25,7 @@
 ChoicesType = (
     model_enums.ChoicesType
     if django_version[0:2] >= (5, 0)
-    else model_enums.ChoicesMeta
+    else getattr(model_enums, "ChoicesMeta")  # removed in Django 5.0
 )
 
 DEFAULT_BOUNDARY = getattr(enum, "KEEP", None)

src/django_enum/fields.py

@@ -787,8 +787,8 @@ def contribute_to_class(
                 constraint |= Q(**{f"{self.name or name}__isnull": True})
             cls._meta.constraints = [
                 *cls._meta.constraints,
-                CheckConstraint(
-                    check=constraint,
+                CheckConstraint(  # type: ignore[call-arg]
+                    check=constraint,  # type: ignore[call-arg]
                     name=self.constraint_name(cls, self.name or name, self.enum),
                 )
                 if django_version[0:2] < (5, 1)
@@ -1254,8 +1254,8 @@ def contribute_to_class(
 
                 cls._meta.constraints = [
                     *cls._meta.constraints,
-                    CheckConstraint(
-                        check=constraint,
+                    CheckConstraint(  # type: ignore[call-arg]
+                        check=constraint,  # type: ignore[call-arg]
                         name=self.constraint_name(cls, self.name or name, self.enum),
                     )
                     if django_version[0:2] < (5, 1)

src/django_enum/query.py

@@ -27,7 +27,7 @@ def process_lhs(self, compiler, connection, lhs=None):
         return lhs_sql, lhs_params
 
     def get_rhs_op(self, connection, rhs):
-        return connection.operators["exact"] % rhs
+        return connection.operators["exact"] % rhs  # type: ignore[attr-defined]
 
 
 # class ExtraBigFlagMixin: