Feature: Provide the IDs of attachment's parent entity #501
Description
During the creation of an Attachment, I need to know to which parent the attachment belongs to. This might be required to build an unique content ID consisting of the parent ID and attachment ID.
This is not possible at the moment, because the class AttachmentCreateEventContext doesn't provide this information.
The SDM plugin implemented this feature already in their plugin code: https://github.com/cap-java/sdm/blob/0617f5db595605da0d4ba013c989acb046fcc224/sdm/src/main/java/com/sap/cds/sdm/service/handler/SDMAttachmentsServiceHandler.java#L177