feat: add v4.1.0 upgrade handler

[RiccardoM]

Description

This PR adds the v4.1.0 upgrade handler

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Author Checklist

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• included the correct type prefix in the PR title
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• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
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• confirmed the correct type prefix in the PR title
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[codecov]

Codecov Report

Merging #959 (0457f51) into master (7a30b48) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #959   +/-   ##
=======================================
  Coverage   82.46%   82.46%           
=======================================
  Files         167      167           
  Lines       14243    14244    +1     
=======================================
+ Hits        11745    11746    +1     
  Misses       2014     2014           
  Partials      484      484           

Impacted Files	Coverage Δ
app/app.go	88.12% <100.00%> (+0.01%)	⬆️

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