Add 10.13 to test matrix

[urfeex]

Run integration tests on 10.13, as well.

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Note

Low Risk
CI workflow matrix change only; no production or library code is modified.

Overview
Extends the run_tests job in CI with a new matrix combination: ur15 on URSim 10.13.0, using the existing PolyScope X program folder (tests/resources/dockerursim/programs/polyscopex).

That adds a full integration run (URSim, ctest, examples, coverage) for the new simulator version alongside the existing PolyScope X entries (10.7.0–10.12.0).

^{Reviewed by Cursor Bugbot for commit 70ad31e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.78%. Comparing base (ca25b13) to head (70ad31e).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #517      +/-   ##
==========================================
- Coverage   78.82%   78.78%   -0.04%     
==========================================
  Files         116      115       -1     
  Lines        6611     6525      -86     
  Branches     2920     2920              
==========================================
- Hits         5211     5141      -70     
+ Misses       1032     1015      -17     
- Partials      368      369       +1     

Flag	Coverage Δ
check_version_ur10-3.15.8	11.38% <ø> (-1.33%)	⬇️
check_version_ur10e-10.11.0	11.38% <ø> (-0.10%)	⬇️
check_version_ur10e-5.15.2	11.38% <ø> (-0.24%)	⬇️
check_version_ur12e-10.12.1	11.38% <ø> (ø)
check_version_ur12e-5.25.1	11.38% <ø> (-0.42%)	⬇️
check_version_ur15-10.12.1	11.38% <ø> (ø)
check_version_ur15-5.25.1	11.38% <ø> (-0.05%)	⬇️
check_version_ur16e-10.12.1	11.38% <ø> (-0.05%)	⬇️
check_version_ur16e-5.25.1	11.38% <ø> (ø)
check_version_ur18-10.12.1	11.38% <ø> (-0.05%)	⬇️
check_version_ur18-5.25.1	11.38% <ø> (-0.24%)	⬇️
check_version_ur20-10.12.1	11.38% <ø> (-0.05%)	⬇️
check_version_ur20-5.25.1	11.58% <ø> (+0.19%)	⬆️
check_version_ur3-3.14.3	12.07% <ø> (+0.41%)	⬆️
check_version_ur30-10.12.1	11.38% <ø> (-0.10%)	⬇️
check_version_ur30-5.25.1	11.38% <ø> (-0.20%)	⬇️
check_version_ur3e-10.11.0	11.38% <ø> (ø)
check_version_ur3e-5.9.4	11.75% <ø> (+0.36%)	⬆️
check_version_ur5-3.15.8	11.80% <ø> (-0.42%)	⬇️
check_version_ur5e-10.11.0	11.38% <ø> (ø)
check_version_ur5e-5.12.8	11.38% <ø> (-0.05%)	⬇️
check_version_ur7e-10.11.0	11.38% <ø> (ø)
check_version_ur7e-5.22.2	11.58% <ø> (+0.19%)	⬆️
check_version_ur8long-10.12.1	11.38% <ø> (ø)
check_version_ur8long-5.25.1	11.38% <ø> (-0.20%)	⬇️
python_scripts	?
start_ursim	83.51% <ø> (-1.27%)	⬇️
ur5-3.14.3	74.32% <ø> (-0.29%)	⬇️
ur5e-10.11.0	68.74% <ø> (-0.23%)	⬇️
ur5e-10.12.0	70.05% <ø> (+0.14%)	⬆️
ur5e-10.7.0	68.50% <ø> (+0.01%)	⬆️
ur5e-5.9.4	75.14% <ø> (ø)

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