Servers: Fixed slow access to client's extra attributes provided

[francis-clairicia]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (7c1079d) to head (d2dedd3).
Report is 44 commits behind head on main.

Additional details and impacted files

Flag	Coverage Δ
OS-Linux	99.88% <100.00%> (+<0.01%)	⬆️
OS-Windows	99.76% <100.00%> (+<0.01%)	⬆️
OS-macOS	99.88% <100.00%> (+<0.01%)	⬆️
Py-3.11	99.90% <100.00%> (+<0.01%)	⬆️
Py-3.12	99.92% <100.00%> (+<0.01%)	⬆️
test-functional	81.67% <100.00%> (+0.02%)	⬆️
test-unit	89.35% <40.00%> (+<0.01%)	⬆️

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