🐛 Fix neutral defect handling in CDS and correct gate design termination condition.

[Drewniok]

Description

This PR fixes two bugs:

1. It is checked now if a defect is charged when adding it to a cds.
2. The termination condition for Automatic Exhaustive Gate Design was missing.

Thanks to @wlambooy for reporting a strange behavior of on-the-fly defect aware layout design.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have added a changelog entry.
• I have created/adjusted the Python bindings for any new or updated functionality.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[github-actions]

clang-tidy made some suggestions

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.22%. Comparing base (42ba962) to head (ad7f957).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #551      +/-   ##
==========================================
- Coverage   98.22%   98.22%   -0.01%     
==========================================
  Files         228      228              
  Lines       35706    35730      +24     
  Branches     1691     1691              
==========================================
+ Hits        35072    35095      +23     
- Misses        634      635       +1     

Files with missing lines	Coverage Δ
...n/algorithms/physical_design/design_sidb_gates.hpp	98.55% <100.00%> (+0.01%)	⬆️
...fiction/technology/charge_distribution_surface.hpp	99.40% <100.00%> (+<0.01%)	⬆️
...t/algorithms/physical_design/design_sidb_gates.cpp	100.00% <100.00%> (ø)
test/technology/charge_distribution_surface.cpp	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 42ba962...ad7f957. Read the comment docs.

[github-actions]

clang-tidy made some suggestions