Add more information from the workflow when writing a Task

Currently, the TaskWriter writes some information from the Workflow itself such as the model name and the instance id.

Having more information from the Workflow could be interesting from the client side when fetching only a list of tasks (where we have no document/workflow fetched before), such as:

• the workflow initiator
• the workflow title
• the workflow life cycle state
• the graph route URL

For instance, having more information will avoid the mobile application to do another call to just get the workflow initiator when navigating to a task.