fix: Improve efficiency and apply overall fixes to the role processes

[spetrosi]

Improvements after QE tests

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Refreshed the README to provide clearer guidance on installing and using the system OpenMPI package and ensure consistent phrasing for loading environment modules.

File-Level Changes

Change	Details	Files
Clarify purpose and installation advice for system OpenMPI	Replaced the brief utility description with guidance on non-CUDA and non-GPU use cases Added a note on safe co-existence with other OpenMPI installations Enhanced introductory sentence for module usage	README.md
Standardize lmod command phrasing	Changed “for this openmpi” to “to select this openmpi” Applied the wording update in both the system OpenMPI and OpenMPI v5.x sections	README.md

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