fix: reloading relative imports on plugin updates

[jamagalhaes]

Issue:

KOALA-2422

Description:

This PR solves issues where dependent modules and implicit imports (e.g., __init__.py files) could be executed before being securely evaluated inside a sandbox. It also ensures the latest version of all modules is always loaded during execution.

Key Changes:

1. Ensured Secure Evaluation of Dependent Modules:

   • Modified the evaluation flow to ensure dependent modules (including __init__.py files) are evaluated securely inside the sandbox before being executed.
   • Prevented premature execution of dependent modules by deferring their evaluation until all implicit imports are properly handled.
   • Introduced recursive evaluation for implicit imports to ensure all modules in the package hierarchy are securely and consistently evaluated.
   • Implemented caching of evaluated modules to prevent redundant or infinite recursive evaluations.

2. Ensured the Latest Version of Modules is Loaded:

   • Added importlib.reload to reload modules already present in sys.modules.
   • Guarantees that the latest version of any module is always used during execution, addressing issues with outdated module code.

[beaugunderson]

looks great, thanks for the comprehensive tests as well!

[aduane]

I just used the same steps I used to confirm the issue and can confirm this fixes it!

Awesome!