implement features needed for caching in ranking

[akmohtashami]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 65 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.81%. Comparing base (101e372) to head (197e719).
⚠️ Report is 3 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
cmsranking/RankingWebServer.py	0.00%	37 Missing ⚠️
cmscommon/eventsource.py	0.00%	24 Missing ⚠️
cmsranking/Config.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1706      +/-   ##
==========================================
- Coverage   53.89%   53.81%   -0.08%     
==========================================
  Files         341      341              
  Lines       27985    28026      +41     
==========================================
  Hits        15083    15083              
- Misses      12902    12943      +41     

Flag	Coverage Δ
functionaltests	0.00% <0.00%> (ø)
unittests	53.81% <0.00%> (-0.08%)	⬇️

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