feat: improve session result logging

[piksel]

• logs the session result as an info level message without notification instead of debug
• does not log that no notification was sent if there are no notifications enabled

Fixes #1122

[codecov]

Codecov Report

Merging #1123 (50356ed) into main (4a66a69) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1123      +/-   ##
==========================================
- Coverage   61.96%   61.89%   -0.07%     
==========================================
  Files          22       22              
  Lines        1438     1438              
==========================================
- Hits          891      890       -1     
- Misses        463      464       +1     
  Partials       84       84              

Impacted Files	Coverage Δ
pkg/notifications/shoutrrr.go	73.07% <0.00%> (-1.29%)	⬇️

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