chore: add more tracing around webhooks

[zepatrik]

No description provided.

[codecov]

Codecov Report

Merging #3441 (535e69a) into master (610c76d) will increase coverage by 0.01%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

❗ Current head 535e69a differs from pull request most recent head 5d43e20. Consider uploading reports for the commit 5d43e20 to get more accurate results

@@            Coverage Diff             @@
##           master    #3441      +/-   ##
==========================================
+ Coverage   77.99%   78.00%   +0.01%     
==========================================
  Files         327      327              
  Lines       21591    21596       +5     
==========================================
+ Hits        16839    16846       +7     
+ Misses       3496     3494       -2     
  Partials     1256     1256              

Files Changed	Coverage Δ
courier/http.go	55.55% <100.00%> (ø)
courier/sms.go	60.37% <100.00%> (ø)
request/builder.go	73.91% <100.00%> (+1.18%)	⬆️
selfservice/hook/web_hook.go	79.65% <100.00%> (ø)

... and 1 file with indirect coverage changes