Report Sibling Path Names

Run report no longer mangles the names of paths that share a prefix with the working directory

When a run's path shared a string prefix with the working directory without being nested under it, the run report shortened its name by shearing off the prefix mid-segment. A working directory of /repo/project alongside a run at /repo/project-staging/unit produced the name -staging/unit.

The report now shortens a path only when it is genuinely nested under the working directory. Sibling paths keep their full name.