[Bug Report] before_perform invoked before context is validated

[mjonas87]

Current Behavior

Currently, the before_perform logic runs before the context is validated. I'm not sure if this is expected, but it seems unexpected to me.

Expected Behavior

Context should be validated before before_perform callback runs

Steps to Reproduce

1. Create an interactor that uses a before_perform event and also has context validation
2. Call the interactor in a way that violates the context validation
3. Observe that before_perform is called before the context is checked for validity