We would like to have a sample history workflow that allows us to track in chronological order (when possible), the activities in which a Sample (Entity) has been referenced. After playing around with it in [this branch](https://gitlab.mpcdf.mpg.de/nomad-lab/nomad-FAIR/-/tree/smaple-history-workflow-poc?ref_type=heads) and the HZB ELN from @g-michaelgoette, we could reach some automated workflow graphs (after reprocessing the uploads).  - [x] Create a normalizer from a class inheriting from `Entity` or `Entity` itself for the workflow. - [ ] Investigate if Making `Activities` also a `Task` is the only way for this. - [ ] If `Task` needs to stay, hide properties in Activities coming from this class - [ ] Make sure that the `entry_type` does not become `Workflow` and that it keeps its original name.