fix: set parent to zero commit SHA if no parent exists on push (#595)

[JamieSlome]

Closes #595

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

Package	Version	Score	Details

Scanned Manifest Files

[netlify]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	9f7b1ea
🔍 Latest deploy log	https://app.netlify.com/sites/endearing-brigadeiros-63f9d0/deploys/67161f44a620480009bec445

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 57.75%. Comparing base (3ae282b) to head (9f7b1ea).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/proxy/processors/push-action/parsePush.js	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #752      +/-   ##
==========================================
- Coverage   57.79%   57.75%   -0.04%     
==========================================
  Files          46       46              
  Lines        1597     1598       +1     
==========================================
  Hits          923      923              
- Misses        674      675       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.