chore: limit the length of event guid

[CarlJi]

No description provided.

[netlify]

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Name	Link
🔨 Latest commit	766e197
🔍 Latest deploy log	https://app.netlify.com/sites/reviewbot-x/deploys/66d140f1124d810008cedd74

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 37.92%. Comparing base (f015094) to head (766e197).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
server.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #295      +/-   ##
==========================================
- Coverage   37.96%   37.92%   -0.05%     
==========================================
  Files          23       23              
  Lines        1799     1801       +2     
==========================================
  Hits          683      683              
- Misses       1035     1037       +2     
  Partials       81       81              

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