refactor(changelog): shorten generate_tree_from_commits and use set to check used tags

[bearomorphism]

Description

Checklist

• [ ] I have read the contributing guidelines

Code Changes

• [ ] Add test cases to all the changes you introduce
• [ ] Run poetry all locally to ensure this change passes linter check and tests
• [ ] Manually test the changes:
  • [ ] Verify the feature/bug fix works as expected in real-world scenarios
  • [ ] Test edge cases and error conditions
  • [ ] Ensure backward compatibility is maintained
  • [ ] Document any manual testing steps performed
• [ ] Update the documentation for the changes