findRepoPathForWorktree phase-2 scans git worktree list from the workspace path upward to / when phase-1 does not find a .git directory (gitfile worktrees).
pnpm --filter @jleechanorg/ao-core exec vitest run src/__tests__/worktree-git.test.tsExpected: all tests pass, including “phase-2 runs when cwd is /”.