Adjust domain-based weighting

[NicolaCourtier]

Description

Adjust the treatment of the end points in the domain-based weighting so that the mean weighting is equal to one.

Issue reference

Fix following #659

Review

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• Updated the CHANGELOG.md in reverse chronological order (newest at the top) with a concise description of the changes, including the PR number.
• Noted any breaking changes, including details on how it might impact existing functionality.

Type of change

• New Feature: A non-breaking change that adds new functionality.
• Optimization: A code change that improves performance.
• Examples: A change to existing or additional examples.
• Bug Fix: A non-breaking change that addresses an issue.
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• Refactoring: Non-functional changes that improve the codebase.
• Style: Non-functional changes related to code style (formatting, naming, etc).
• Testing: Additional tests to improve coverage or confirm functionality.
• Other: (Insert description of change)

Key checklist:

• No style issues: $ pre-commit run (or $ nox -s pre-commit) (see CONTRIBUTING.md for how to set this up to run automatically when committing locally, in just two lines of code)
• All unit tests pass: $ nox -s tests
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• Code is well-commented, especially in complex or unclear areas.
• Added tests that prove my fix is effective or that my feature works.
• Checked that coverage remains or improves, and added tests if necessary to maintain or increase coverage.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.26%. Comparing base (df79ec2) to head (f6bb9d0).
Report is 24 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #696      +/-   ##
===========================================
+ Coverage    99.21%   99.26%   +0.04%     
===========================================
  Files           67       68       +1     
  Lines         4842     4896      +54     
===========================================
+ Hits          4804     4860      +56     
+ Misses          38       36       -2     

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