Oh right, `imageUrl` is the name of the field relative to what the app
expects, but under the hood `useOutfitAppearance` actually makes that
an alias for `imageUrlV2(idealSize: SIZE_600)`.
So we need to cache it as the same field with the same params, rather
than as just plain `imageUrl`!
This fixes the bug where wearing an item from search would require a
network round-trip and visually remove all items in the meantime.
(Also, none of this issue was visible to most users, because item
search is still feature-flagged onto the old GQL one for most people!)