So event B happens. A previous event, event A, foreshadows event B. However, the foreshadowing to the event (B) is mentioned after the reader is already aware of the event (B) has taken place. Is this still foreshadowing, or something else?
To explain further, the specific situation is this (from Fallout 4): …in the Vault-Tec Regional HQ there’s a terminal with a log entry for 10/07 that reads “Walter in the warehouse just told me we received a massive shipment marked “Vault 111 – DO NOT OPEN”. So, he opened it… and it was hundreds of gallons of liquid nitrogen! What could they possibly need that for?”
This is event A, foreshadowing event B (the main character being cryogenically frozen in Vault 111), after the player has already experienced event B.
Yes, the example you mentioned is foreshadowing. This particular sentence, “Vault 111 – DO NOT OPEN” foreshadows the upcoming danger or event B, which the main character being cryogenically frozen in Vault 111. This was the warning, already mentioned in event A.