core: improve tools to log and reproduce requests

[eckter]

We already had an env variable to write STDCM payloads to files, and a cli command to rerun such payload. This PR adds the same things for pathfinding and simulation requests.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.80%. Comparing base (1fe7f70) to head (a7e5c58).
Report is 32 commits behind head on dev.

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10522      +/-   ##
==========================================
- Coverage   81.81%   81.80%   -0.01%     
==========================================
  Files        1073     1073              
  Lines      106718   106718              
  Branches      730      730              
==========================================
- Hits        87307    87300       -7     
- Misses      19372    19379       +7     
  Partials       39       39              

Flag	Coverage Δ
editoast	74.27% <ø> (-0.03%)	⬇️
front	89.34% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.05% <ø> (ø)

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