Fix stats adding multiple times same summary

[Neylix]

Description

Fixes a problem where is was possible that the stats add several times the same beacon summary.

Also enhance the stats file, since only the last summary stats are used we don't need to store each sats for each summary

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules