test(websearch-cmd): rewrite lazy-load comment for v2 dispatch hook path
Stale comment described the deleted v1 path (loadLazyExtension /
handleLazyExtensionReady / lazy-stub iframe). Replace with the
actual current path: tile-lazy.ts pre-publish dispatch hook →
launchTile → tile-lifecycle ready signal.
(Job 2 of the v1-removal cleanup: loadLazyExtension itself was
deleted in the prior commit alongside the rest of the v1 lazy
machinery, since it was only ever a no-op stub called from now-
deleted code. No FSM bookkeeping needed to migrate.)