I'm trying to store some Eth I have in Parity into cold storage. Since I have no guarantee that Parity will continue being supported several years/decades in the future, or that the seed passphrase and/or key encryption algorithms won't change, I want my cold storage backup to also include my account's unencrypted private key, so that I can load that into any Ethereum wallet being used at the time and have access to my funds, without having to rely on potentially obsolete software.
Looking for this functionality in Parity, all I could find so far is the Export feature, which doesn't seem to include any keys, encrypted or otherwise, and the keystore located at
\AppData\Roaming\Parity\Ethereum\keys\ethereum, which is encrypted from what I understand. How do I get my private key decrypted?