Exercise 2: Confirming the Breadcrumb Order — Possible Solution
====================================================================

SETUP
------------------------------
Three real rows in the pages table:
  id: 1, title: 'Programming',              parent_id: NULL
  id: 2, title: 'General-Purpose Languages', parent_id: 1
  id: 3, title: 'Java',                      parent_id: 2

CALLING getBreadcrumb(pool, 3)
------------------------------
The while loop starts at currentId = 3, unshifts the Java row, moves
to parent_id (2), unshifts the General-Purpose Languages row at the
front, moves to parent_id (1), unshifts the Programming row at the
front, then stops since Programming's own parent_id is NULL.

RESULT
------------------------------
[Programming, General-Purpose Languages, Java] - the root ancestor
first, the page itself last, the correct order for rendering a
breadcrumb nav left to right.

WHY THIS WORKS AS AN ANSWER
------------------------------
It correctly traces the while loop's own repeated unshift calls
across three real levels, and correctly shows the resulting array
lands in root-to-leaf order.