add message prefix

[sibalzer]

let's drop the v4 branch an merge this as a feat onto main.

[codecov]

Codecov Report

Merging #124 (a8d83ad) into main (08ec0a9) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #124      +/-   ##
==========================================
+ Coverage   92.57%   92.62%   +0.04%     
==========================================
  Files          12       12              
  Lines         606      610       +4     
==========================================
+ Hits          561      565       +4     
  Misses         45       45              

Impacted Files	Coverage Δ
src/config_skeleton.py	100.00% <ø> (ø)
tests/test_impfbot.py	100.00% <ø> (ø)
src/impfbot.py	87.50% <100.00%> (ø)
tests/test_settings.py	100.00% <100.00%> (ø)

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[sibalzer]

all good

[paulypeter]

Looks good to me, tests are passing now as well