add hidden _append parameter

[PythonFZ]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 88.05%. Comparing base (0be558e) to head (400dad9).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
zntrack/project.py	20.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #887      +/-   ##
==========================================
- Coverage   88.40%   88.05%   -0.36%     
==========================================
  Files          35       35              
  Lines        1966     1975       +9     
==========================================
+ Hits         1738     1739       +1     
- Misses        228      236       +8     

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