refact pkg/csplugin: prevent race condition, simpler loop, don't trigger broker on noop

[mmetc]

No description provided.

[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.

[mmetc]

this should reduce (if not remove) the flakiness in https://github.com/crowdsecurity/crowdsec/actions/runs/21713230734/job/62644176583

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.19%. Comparing base (1df2c55) to head (f80b141).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4294      +/-   ##
==========================================
+ Coverage   63.11%   63.19%   +0.07%     
==========================================
  Files         473      473              
  Lines       33466    33459       -7     
==========================================
+ Hits        21123    21143      +20     
+ Misses      10222    10203      -19     
+ Partials     2121     2113       -8     

Flag	Coverage Δ
bats	46.59% <79.41%> (+0.01%)	⬆️
unit-linux	36.08% <97.05%> (+0.01%)	⬆️
unit-windows	24.49% <64.70%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.