Apply the same fingerprint-cache pattern as the container row cache to
the rebuild-queue list. Maintain rebuildQueueRowCache (Map<id, {el,
fingerprint}>) so renderRebuildQueue can reuse <li> nodes whose state
hasn't changed across rebuild_queue_changed snapshots.
The rebuild queue emits a full snapshot on every mutation (a single
rebuild emits queued → running (+ step changes) → done/failed — each
transition is an event). Before this change every event caused a full
replaceChildren() wipe of the list. After this change only the row(s)
whose fingerprint changed get rebuilt; the rest survive intact.
The elapsed-time ticker (data-rqe-elapsed + 1s setInterval) already
updates running-entry timestamps in-place, so ticking elapsed seconds
don't require a re-render and are excluded from the fingerprint.
DOM order is reconciled via insertBefore with no wipe, same as the
container cache.
029ae69953