fix: reduce DB and log bloat by not logging writePack content

[kriswest]

resolves #1388

Reduces bloat of DB records and server logs (by 13x!) by not logging a byte array encoding the git index files created in the writePack step.

[netlify]

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🔨 Latest commit	bf516a9
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[github-actions]

Dependency Review

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

Scanned Files

None

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.34%. Comparing base (c206394) to head (bf516a9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1389      +/-   ##
==========================================
- Coverage   81.35%   81.34%   -0.01%     
==========================================
  Files          65       65              
  Lines        4649     4648       -1     
  Branches      792      792              
==========================================
- Hits         3782     3781       -1     
  Misses        852      852              
  Partials       15       15              

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