feat: make throttling check interval configurable

[jstucke]

• make THROTTLE_INTERVAL configurable through the main config
  • and set it to 0.5 for the tests to reduce unnecessary sleeps and speed them up

[codecov-commenter]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.90%. Comparing base (a392b42) to head (e458efc).

Files with missing lines	Patch %	Lines
src/scheduler/unpacking_scheduler.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1391   +/-   ##
=======================================
  Coverage   91.90%   91.90%           
=======================================
  Files         372      372           
  Lines       20955    20955           
=======================================
  Hits        19259    19259           
  Misses       1696     1696           

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