Use more sophisticated random seed

[1kastner]

No description provided.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (9970eef) 94.17% compared to head (a05be93) 94.17%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #199   +/-   ##
=======================================
  Coverage   94.17%   94.17%           
=======================================
  Files         122      122           
  Lines        4839     4840    +1     
=======================================
+ Hits         4557     4558    +1     
  Misses        282      282           

Files	Coverage Δ
...onflowgen/api/container_flow_generation_manager.py	96.87% <100.00%> (+0.10%)	⬆️
...ation/repositories/random_seed_store_repository.py	97.82% <100.00%> (+0.09%)	⬆️
...nerator/assign_destination_to_container_service.py	100.00% <ø> (ø)

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