Fix frequency in FI curve and add global parameters

[AurelienJaquier]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 52.49%. Comparing base (8d5b0ab) to head (dcad6de).
Report is 96 commits behind head on main.

Files with missing lines	Patch %	Lines
bluepyemodel/emodel_pipeline/plotting.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #170      +/-   ##
==========================================
- Coverage   60.07%   52.49%   -7.59%     
==========================================
  Files         109      124      +15     
  Lines        7838    10418    +2580     
==========================================
+ Hits         4709     5469     +760     
- Misses       3129     4949    +1820     

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[darshanmandge]

I checked for one of the e-models. FI-curve works now.