fix(eni): allow vid = 0 in ecsHighDensity mode and add corresponding …

[l1b0k]

…tests

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.98%. Comparing base (9ec7609) to head (27f42ec).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #922      +/-   ##
==========================================
+ Coverage   59.86%   59.98%   +0.11%     
==========================================
  Files         131      131              
  Lines       19894    19894              
==========================================
+ Hits        11910    11933      +23     
+ Misses       6815     6795      -20     
+ Partials     1169     1166       -3     

Flag	Coverage Δ
unittests	59.98% <100.00%> (+0.11%)	⬆️

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