fix: flatten duration serialization to seconds

[AlonLStarkWare]

• Revert "fix: fix dump to config (fix: fix dump to config #1637)"
• fix: flatten duration serialization to seconds

[reviewable-StarkWare]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 12.70%. Comparing base (e3165c4) to head (6d65030).
Report is 64 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1647       +/-   ##
===========================================
- Coverage   40.10%   12.70%   -27.41%     
===========================================
  Files          26      213      +187     
  Lines        1895    29372    +27477     
  Branches     1895    29372    +27477     
===========================================
+ Hits          760     3731     +2971     
- Misses       1100    25386    +24286     
- Partials       35      255      +220     

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