docs(madr): logging standard

[jakubdyszkiewicz]

Summary

I'd like to standardize a little bit a way how we handle logging in Kuma.

Please post suggestions!

Issues resolved

xref #879

[codecov-commenter]

Codecov Report

Merging #4445 (2b4573e) into master (739ed02) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4445      +/-   ##
==========================================
- Coverage   55.51%   55.47%   -0.04%     
==========================================
  Files         941      941              
  Lines       57669    57669              
==========================================
- Hits        32017    31994      -23     
- Misses      23110    23118       +8     
- Partials     2542     2557      +15     

Impacted Files	Coverage Δ
pkg/defaults/mesh.go	64.28% <0.00%> (-14.29%)	⬇️
pkg/clusterid/creator.go	73.33% <0.00%> (-13.34%)	⬇️
pkg/core/tokens/default_signing_key.go	66.66% <0.00%> (-11.12%)	⬇️
pkg/metrics/store/counter.go	74.54% <0.00%> (-10.91%)	⬇️
pkg/core/runtime/component/component.go	83.87% <0.00%> (-9.68%)	⬇️
pkg/xds/cache/once/cache.go	87.17% <0.00%> (-7.70%)	⬇️
pkg/core/tokens/signing_key_manager.go	85.00% <0.00%> (-5.00%)	⬇️
...s/authn/api-server/tokens/admin_token_bootstrap.go	82.00% <0.00%> (-4.00%)	⬇️
pkg/defaults/components.go	82.14% <0.00%> (-3.58%)	⬇️
pkg/core/secrets/manager/global_manager.go	39.39% <0.00%> (-3.04%)	⬇️
... and 5 more

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[jakubdyszkiewicz]

removed 8. point altogether. After looking more at logs I'm not sure there is a stable pattern we can follow. Sometimes it make sense to log before action, sometimes after, sometimes both.

[bartsmykla]

lgtm

[michaelbeaumont]

LGTM

[slonka]

I love the general direction of this MADR but I would like to understand some of the things mentioned here or change them if there is consensus to do so.