fixup: Pass violation_error_code to init

Author: q0w

django-stubs/db/models/constraints.pyi

@@ -18,7 +18,9 @@ class BaseConstraint:
     violation_error_code: str | None
     violation_error_message: _StrOrPromise | None
     default_violation_error_message: _StrOrPromise
-    def __init__(self, name: str, violation_error_message: _StrOrPromise | None = ...) -> None: ...
+    def __init__(
+        self, name: str, violation_error_code: str | None = ..., violation_error_message: _StrOrPromise | None = ...
+    ) -> None: ...
     def constraint_sql(self, model: type[Model] | None, schema_editor: BaseDatabaseSchemaEditor | None) -> str: ...
     def create_sql(self, model: type[Model] | None, schema_editor: BaseDatabaseSchemaEditor | None) -> str: ...
     def remove_sql(self, model: type[Model] | None, schema_editor: BaseDatabaseSchemaEditor | None) -> str: ...