Add condition to skip retrieving models that are not cascadable

[ysfks]

This update improves the handling of CascadeQueryListener in scenarios where the model is not cascadable or lacks a primary key. Currently, since CascadeQueryListener is hooked to the QueryExecuted event, it triggers an unnecessary retrieve operation even for models that are not meant to be cascaded or have a null primary key.

In cases such as mass deletion processes, this adds an extra query and processing time, slowing down performance. This PR introduces a condition to check if (!$this->hasCascadingRelations($builder->getModel()) or $keyName === null), preventing the redundant retrieve event, thus optimizing the cascade process and reducing unnecessary overhead.

Key changes:

•	Added checks for non-cascadable models and null primary keys to avoid extra queries and delays.
•	Ensures that only relevant models trigger the cascade action, optimizing performance in mass deletion or similar operations.

[gcphost]

Looks good to me, can you fix the issues reported with styleci?