Add Document Status concepts to represent workflows involving documents

[coolharsh55]

While modelling contracts, it was agreed that the status of a 'document' would be a useful concept to have for representing organisational workflows for managing documents such as policies, reports, assessments, records. These can be added to DPV - though their subjective nature may better suit a separate extension for support organisational processes not specific to DPV's core focus (data/tech). The use-case discussed was for a DPO or a person in a role who manages documents and can see their 'latest status' in a dashboard. The internal recording of activities that lead to these statuses was also discussed and agreed to be a separate type of information (e.g. logs). Such statuses can be about:

• Document Drafting
• Document Reviewing
• Document Approval
• Document Live / Active
• Document Updating