Add source comments to reusable infrastructure components

[per1234]

The project infrastructure uses reusable components that are maintained in a centralized repository. Documenting the source of these components facilitates maintenance, either by pulling in changes made upstream, or pushing locally implemented changes back upstream.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.33%. Comparing base (e1151ea) to head (249deae).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #948   +/-   ##
=======================================
  Coverage   83.33%   83.33%           
=======================================
  Files           1        1           
  Lines         180      180           
=======================================
  Hits          150      150           
  Misses         19       19           
  Partials       11       11           

Flag	Coverage Δ
unit	83.33% <ø> (ø)

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