Hashchecker fix + docs

[LeChatP]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 26.56250% with 94 lines in your changes are missing coverage. Please review.

Project coverage is 44.52%. Comparing base (078d192) to head (99764d2).
Report is 3 commits behind head on main.

❗ Current head 99764d2 differs from pull request most recent head e52a126. Consider uploading reports for the commit e52a126 to get more accurate results

Files	Patch %	Lines
src/sr/main.rs	24.52%	40 Missing ⚠️
src/mod.rs	21.05%	15 Missing ⚠️
src/sr/timeout.rs	16.66%	10 Missing ⚠️
src/database/mod.rs	0.00%	9 Missing ⚠️
src/config.rs	11.11%	8 Missing ⚠️
src/plugin/hashchecker.rs	60.00%	6 Missing ⚠️
src/util.rs	0.00%	5 Missing ⚠️
src/api.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #44       +/-   ##
===========================================
- Coverage   67.68%   44.52%   -23.17%     
===========================================
  Files          19       19               
  Lines        6097     2875     -3222     
===========================================
- Hits         4127     1280     -2847     
+ Misses       1970     1595      -375     

Flag	Coverage Δ
unittests	44.52% <26.56%> (-23.17%)	⬇️

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