add slackdown to Reactive Balance

[rodrigomha]

Closes #1168

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.15%. Comparing base (9ce3aa8) to head (1c32fae).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1202      +/-   ##
==========================================
- Coverage   77.24%   77.15%   -0.10%     
==========================================
  Files         121      121              
  Lines       13418    13419       +1     
==========================================
- Hits        10365    10353      -12     
- Misses       3053     3066      +13     

Flag	Coverage Δ
unittests	77.15% <100.00%> (-0.10%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/network_models/network_constructor.jl	92.77% <100.00%> (+0.08%)	⬆️

... and 4 files with indirect coverage changes

[github-actions]

Performance Results

Version	Precompile Time
Main	4.143872404
This Branch	4.182758982

Version	Build Time
Main-Build Time Precompile	67.005749457
Main-Build Time Postcompile	1.032923138
This Branch-Build Time Precompile	64.577283992
This Branch-Build Time Postcompile	0.964751902

Version	Solve Time
Main-Solve Time Precompile	888.340101375
Main-Solve Time Postcompile	855.183671915
This Branch-Solve Time Precompile	446.614925227
This Branch-Solve Time Postcompile	400.630451809