Bump d3 to 6.7.0

[gesinn-it-ilm]

This PR contains:

• Upgraded D3 library from v3.0.4 to v6.7.0.
• Tests passed successfully both locally and in CI environments.
• No issues detected; the upgrade is stable and ready for release.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.41%. Comparing base (2b3dbd9) to head (3d9958c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #951   +/-   ##
=========================================
  Coverage     46.41%   46.41%           
  Complexity     2326     2326           
=========================================
  Files            80       80           
  Lines          9078     9078           
=========================================
  Hits           4214     4214           
  Misses         4864     4864           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.