Function strict_decrypt_cipher_view 

fn strict_decrypt_cipher_view(
    cipher: &Cipher,
    ctx: &mut KeyStoreContext<'_, KeySlotIds>,
    key: SymmetricKeySlotId,
) -> Result<CipherView, CryptoError>

Strict Cipher → CipherView decryption body, used by the StrictDecrypt<Cipher> impl when the cipher is in the legacy field-level format.