Office export encoded and kept a separate copy of an image for every place
a page drew it, so a short content stream repeating Do on one large image
multiplied it into gigabytes before the writers' limits applied. Each image
object is now encoded once and its bytes shared (pdfcraft_export::Image
holds an Arc<[u8]>), distinct pictures share a 512 MiB budget whose
overflow lists the page as truncated, and RTF, which leaves pictures out,
prepares none.
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