PGP Encryption Plugin

We need to be able to encrypt and decrypt using PGP algorithm, but as opposed to the existing Vuram plugin, this version will use AES 256 cypher and will produce a binary file instead of an ASCII armour one.

PGP Encrypt takes a list of Appian SourceDocumentId (any file — PDF, CSV, image, ZIP, etc.), reads its raw binary content via ContentService, PGP-encrypts it with AES-256, and saves the result as a list of new .pgp document in the specified Appian folder. PGP Decrypt takes a list of EncryptedDocumentId, decrypts the binary, and restores the original files as a list of new Appian document — automatically stripping the .pgp suffix from the filename. Both services work with Appian Document IDs and Folder IDs, so they integrate natively with the Process Modeler.

Previous version fails to deploy where the plugin was pre-release tested, new version required to overcome the issue.