Document the process of using OData endpoints for data visualisation

[spwoodcock]

Is your feature request related to a problem? Please describe.

Follow on from #1440

• FMTM facilitates data collection.
• OData endpoints are a standardised way to ingest this data into other tools: PowerBI, Tableau, Redash, Grafana
• ODK already has good docs on this that we should link to: https://docs.getodk.org/tutorial-mapping-households/

Describe the solution you'd like

• We probably need some extra docs to help flesh out how this can be achieved (based on actual requirements from a mapping project):
  • Submission history for each enumerator
  • Custom date range filtering of submissions
  • Total submissions vs total number features surveyed
  • Filter submissions by tasks
  • Average submission time per enumerator
  • Expected number of submissions vs actual daily submissions
  • Leaderboard based on submission
• Yes, PowerBI is proprietary, but it's free to use, very powerful, and user friendly. We need to be realistic and suggest the easiest solution that most end users will connect with. I would propose we document the process for PowerBI first.

Describe alternatives you've considered

• We should also seriously consider the possibility of running Redash alongside FMTM.
• Redash (open-source) could have the OData endpoints and authentication pre-loaded, then we can craft a few dashboards that are publicly accessible.
• This would remove the requirement for table/graph visualisation in FMTM entirely, outsourcing to tools that are specifically made for this purpose.