docs: Describe how to use Grafana to query logs

[dominik003]

Resolves #1038

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.18%. Comparing base (b84d58d) to head (888926a).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1809   +/-   ##
=======================================
  Coverage   84.18%   84.18%           
=======================================
  Files         186      186           
  Lines        6159     6159           
  Branches      677      677           
=======================================
  Hits         5185     5185           
  Misses        826      826           
  Partials      148      148           

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

This report was generated by comparing cc3a793 with b84d58d.
If you would like to check difference, please check here.

ArtifactName: reg

✨✨ That's perfect, there is no visual difference! ✨✨

item	count
pass	244
change	0
new	0
delete	0

[MoritzWeber0]

LGTM. I implemented the proposals from @zusorio and added docs how to see the pipeline run logs.