[Backport version-24.0] Assure breakthrough time is always cast to ms

[scout-team-app]

Description

Backport of #14207 to version-24.0.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.32%. Comparing base (70f2d66) to head (eab2512).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@               Coverage Diff                @@
##           version-24.0   #14214      +/-   ##
================================================
+ Coverage         91.30%   91.32%   +0.01%     
================================================
  Files               478      478              
  Lines             34077    34081       +4     
================================================
+ Hits              31115    31124       +9     
+ Misses             2962     2957       -5     

Flag	Coverage Δ
cli-tests	35.93% <40.00%> (-0.02%)	⬇️
fuzz	43.51% <40.00%> (+<0.01%)	⬆️
gui-tests	59.18% <40.00%> (-0.01%)	⬇️
performance-and-unit-tests	79.39% <100.00%> (+0.01%)	⬆️
test	45.96% <40.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/ert/config/breakthrough_config.py	97.87% <100.00%> (+0.19%)	⬆️

... and 1 file with indirect coverage changes

[codspeed-hq]

Merging this PR will not alter performance

✅ 36 untouched benchmarks

---

_{Comparing backport-14207-to-version-24.0 (eab2512) with version-24.0 (70f2d66)}