More logrus replacement to use slog

[norkans7]

No description provided.

[codecov]

Codecov Report

Merging #655 (05166db) into main (7970c3f) will decrease coverage by 0.01%.
The diff coverage is 36.53%.

@@            Coverage Diff             @@
##             main     #655      +/-   ##
==========================================
- Coverage   74.05%   74.05%   -0.01%     
==========================================
  Files         100      100              
  Lines       13183    13180       -3     
==========================================
- Hits         9763     9760       -3     
  Misses       2732     2732              
  Partials      688      688              

Files	Coverage Δ
attachments.go	60.22% <0.00%> (ø)
spool.go	23.28% <50.00%> (ø)
sender.go	79.09% <60.86%> (-0.35%)	⬇️
server.go	77.56% <56.00%> (-0.08%)	⬇️
log.go	26.02% <14.28%> (+1.02%)	⬆️

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