test: add unit tests for cache, job queue, session, state, and auth services

[ogabrielluiz]

Summary

• Add unit tests for async in-memory cache, async disk cache, cache utils, threading in-memory cache, job queue service, job service, session service, state service, and auth exceptions
• 14 new files covering previously untested service modules

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• Create PR with unit tests
• Commit unit tests in branch test/services

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.20%. Comparing base (8d01ba4) to head (44d8648).
⚠️ Report is 125 commits behind head on release-1.9.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-1.9.0   #12514      +/-   ##
=================================================
+ Coverage          50.05%   50.20%   +0.14%     
=================================================
  Files               1930     1932       +2     
  Lines             172591   172025     -566     
  Branches           25234    25415     +181     
=================================================
- Hits               86398    86370      -28     
+ Misses             85147    84610     -537     
+ Partials            1046     1045       -1     

Flag	Coverage Δ
backend	56.63% <ø> (+0.80%)	⬆️
frontend	48.98% <ø> (+0.02%)	⬆️
lfx	49.07% <ø> (+<0.01%)	⬆️

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see 262 files with indirect coverage changes

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[github-actions]

Frontend Unit Test Coverage Report

Coverage Summary

Lines	Statements	Branches	Functions
	29.69% (31319/105481)	63.69% (3976/6242)	31.04% (731/2355)

Unit Test Results

Tests	Skipped	Failures	Errors	Time
3104	0 💤	0 ❌	0 🔥	5m 1s ⏱️