Automate fieldpaper collaboration

Currently we are using a manual process to manage the collaboration between local mappers in rural Tanzania and the remote mappers who are helping them. This is very labour intensive making it difficult to scale.

Current workflow is [here](https://docs.google.com/document/d/1dSvMxKHYyfl8O6_vcFhHPodhRN_Dz_cYCaG_yXRBL9k/edit?usp=sharing)

Start by reviewing the current collaboration workflow in the linked Google document. Identify which manual steps need automation and define acceptance criteria with the maintainers; the issue does not name repository files, tests, an entry point, or a concrete definition of done.

Written by the indexing model from the issue text.