The cherry-picked ownership check walked every ancestor up to `/`, so a
HERMES_HOME kept inside a dotfiles checkout (`~/.git`) turned every
root-level test_* scratch file into a protected "git-owned" file and
silently disabled the plugin's core contract. Cut the walk at
HERMES_HOME for in-home paths; out-of-home (/tmp/hermes-*) trees keep
the full walk since is_safe_path already bounds them.
Tests trimmed to the two invariants: quick() drops a stale tracked entry
for a committed test inside a linked worktree (.git pointer FILE) instead
of deleting it, and root-level scratch is still deleted even with a .git
above HERMES_HOME. Dropped the contributor's literal /tmp test (the repo
never writes /tmp) and the guess_category-only case the quick() test
already drives.
8cc183e1e1