align collection guarantee with protobuf schema

[illia-malachyn]

Closes: #768

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 56.46%. Comparing base (7b58582) to head (276409c).
Report is 67 commits behind head on master.

Files with missing lines	Patch %	Lines
test/entities.go	87.50%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #779      +/-   ##
==========================================
+ Coverage   52.92%   56.46%   +3.54%     
==========================================
  Files          35       35              
  Lines        5580     6007     +427     
==========================================
+ Hits         2953     3392     +439     
+ Misses       2231     2124     -107     
- Partials      396      491      +95     

Flag	Coverage Δ
unittests	56.46% <92.00%> (+3.54%)	⬆️

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