pkg/cwhub: cache control / send etag header from file contents, check with HEAD req

[mmetc]

backport from #3187

[github-actions]

@mmetc: There are no 'kind' label on this PR. You need a 'kind' label to generate the release automatically.

• /kind feature
• /kind enhancement
• /kind refactoring
• /kind fix
• /kind chore
• /kind dependencies

Details

I am a bot created to help the crowdsecurity developers manage community feedback and contributions. You can check out my manifest file to understand my behavior and what I can do. If you want to use this for your project, you can check out the BirthdayResearch/oss-governance-bot repository.

[github-actions]

@mmetc: There are no area labels on this PR. You can add as many areas as you see fit.

• /area agent
• /area local-api
• /area cscli
• /area appsec
• /area security
• /area configuration

Details

I am a bot created to help the crowdsecurity developers manage community feedback and contributions. You can check out my manifest file to understand my behavior and what I can do. If you want to use this for your project, you can check out the BirthdayResearch/oss-governance-bot repository.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.78%. Comparing base (534fb14) to head (8f28da0).
Report is 1 commits behind head on releases/1.6.x.

Additional details and impacted files

@@                Coverage Diff                 @@
##           releases/1.6.x    #3189      +/-   ##
==================================================
- Coverage           50.82%   50.78%   -0.04%     
==================================================
  Files                 326      326              
  Lines               38678    38680       +2     
==================================================
- Hits                19658    19645      -13     
- Misses              17095    17106      +11     
- Partials             1925     1929       +4     

Flag	Coverage Δ
bats	40.27% <100.00%> (-0.02%)	⬇️
unit-linux	33.91% <100.00%> (-0.01%)	⬇️
unit-windows	28.39% <100.00%> (-0.01%)	⬇️

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