Additional dependencies have been added to the PdfSignedMessageHandler to handle the state of the signature. After writing the signed message content, the state is set to 'signed' and the state date is updated with the current time. Also, modifications are flushed in the EntityManager to save these changes to the database. Corresponding updates and tests have been made in the PdfSignedMessageHandlerTest file.
The PdfSignedMessageHandler has been updated to handle pdf signed messages: the content is now stored within the object. Also, a PdfSignedMessageHandlerTest has been created to ensure the correct functionality of the updated handler.
Added a new class, PdfSignedMessage, to handle received signed PDF messages. Also, added a serializer for this class, PdfSignedMessageSerializer, for use with messaging. Furthermore, comment documentation has been added to RequestPdfSignMessage and its serializer for better clarity. Updated unit tests are also included.