Introduce Linear#traversal_path convenience method
What does this MR do and why?
It adds simple convenience method to reuse in various places. No user facing changes.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Related to #471610 (closed)