Move all constants to common and ensure init before run

[kzscisoft]

closes #111

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #132 (bc20bca) into main (df4449d) will decrease coverage by 0.01%.
The diff coverage is 57.14%.

@@            Coverage Diff             @@
##             main     #132      +/-   ##
==========================================
- Coverage   72.98%   72.96%   -0.02%     
==========================================
  Files          23       23              
  Lines        2887     2889       +2     
==========================================
+ Hits         2107     2108       +1     
- Misses        780      781       +1     

Impacted Files	Coverage Δ
fair/cli.py	54.34% <ø> (ø)
fair/registry/server.py	82.77% <0.00%> (-0.47%)	⬇️
fair/session.py	63.97% <ø> (ø)
fair/common.py	97.26% <85.71%> (-1.23%)	⬇️
fair/configuration.py	71.63% <100.00%> (ø)

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