Ensure download of self repair on other locally available nodes

[Neylix]

Description

Fix download verification in self repair, based on the authorized node at the summary date.
Also avoid verification when node is authorized and when there is less than 3 authorized nodes in the network.

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

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Epic: #321