The card read PNG text through Pillow's header info, where a later
duplicate prompt chunk silently wins and text after IDAT is missed. The
inspector's bounded reader refuses conflicting duplicates and reads text
after IDAT, so a file with two different prompt chunks showed a card
seed the inspector refused.
PNG cards now read their records with read_inspection_file, the reader
the inspector uses. When it refuses a file the card keeps its
dimensions from Pillow and shows no seed. Other formats still use
Pillow's header info, as the inspector's header read does.