KexGroup1 constructor missing causes TypeError when instantiating

KexGroup1 constructor missing causes TypeError when instantiating: a task in harbor-swesmith-rl-artifacts: Harbor SWE-Smith 强化学习数据产物 (Harbor dataset). When trying to create a KexGroup1 instance, a TypeError is raised because the init method is missing. This affects all key exchange classes that…

The task

When trying to create a KexGroup1 instance, a TypeError is raised because the `__init__` method is missing. This affects all key exchange classes that inherit from or use the same pattern as KexGroup1.

Part of keryszhan/harbor-swesmith-rl-artifacts.