Add functionality for including environment variables as metadata

[kzscisoft]

Environment Variables as Metadata

Issue: #726

Python Version(s) Tested: 3.13

Operating System(s): Ubuntu 24.10

Documentation PR: N/A

📝 Summary

Allows users to specify through globular expressions within their config file or in run.init(...) any environment variables to store as metadata.

🔄 Changes

• Modifications to the run component of the user configuration, adding the option record_shell_vars, a set of globular expressions or None.
• Modification to Run.init method to have parameter record_shell_vars.

✔️ Checklist

• Unit and integration tests passing.
• Pre-commit hooks passing.
• Quality checks passing.
• Updated the documentation.