save grpc knowledge

[Besroy]

This PR aims to preserve knowledge generated during regular debugging and work, making it easier for AI to understand our architecture without having to read the code every time it needs to solve a problem.
Let's save it here for supplementation and correction. No need to merge it now, as it is still in a very early and rough stag

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.08%. Comparing base (370c772) to head (581a6cf).
⚠️ Report is 84 commits behind head on master.
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Additional details and impacted files

@@             Coverage Diff             @@
##           master     #292       +/-   ##
===========================================
- Coverage   64.29%   50.08%   -14.22%     
===========================================
  Files          72       63        -9     
  Lines        4406     4035      -371     
  Branches      555     1755     +1200     
===========================================
- Hits         2833     2021      -812     
+ Misses       1327      889      -438     
- Partials      246     1125      +879     

Components	Coverage Δ
AuthManager	55.55% <ø> (-22.23%)	⬇️
Cache	31.18% <54.12%> (+1.24%)	⬆️
FDS	60.77% <26.31%> (-10.35%)	⬇️
FileWatcher	37.60% <20.00%> (-18.65%)	⬇️
Flip	∅ <ø> (∅)
gRPC	56.59% <46.87%> (-20.46%)	⬇️
Logging	27.65% <22.72%> (-2.53%)	⬇️
Metrics	57.21% <ø> (-23.00%)	⬇️
Options	25.00% <ø> (-75.00%)	⬇️
Setting	29.62% <ø> (-27.17%)	⬇️
StatusObject	37.16% <ø> (-36.67%)	⬇️
Utility	60.72% <100.00%> (-22.00%)	⬇️
Version	36.00% <ø> (-59.84%)	⬇️

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