tarAppender.addTarFile: return error before writing header

[thaJeztah]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.40%. Comparing base (2cd730e) to head (4a54ab2).
⚠️ Report is 51 commits behind head on main.

Files with missing lines	Patch %	Lines
archive.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #51      +/-   ##
==========================================
- Coverage   66.35%   65.40%   -0.95%     
==========================================
  Files          42       42              
  Lines        2027     2035       +8     
==========================================
- Hits         1345     1331      -14     
- Misses        497      531      +34     
+ Partials      185      173      -12     

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