Add information about number of our inputs to the history

[dr-orlovsky]

Prerequisite for fixing RGB-WG/rgb#252

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 0.0%. Comparing base (f3ce1c3) to head (427ceab).
Report is 33 commits behind head on master.

Files with missing lines	Patch %	Lines
src/rows.rs	0.0%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##           master    #73   +/-   ##
=====================================
  Coverage     0.0%   0.0%           
=====================================
  Files          24     24           
  Lines        2159   2165    +6     
=====================================
- Misses       2159   2165    +6     

Flag	Coverage Δ
rust	0.0% <0.0%> (ø)

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