Support storage model on internal network

[masonlr]

Goal

Support a model where client brings own storage server, i.e. no simulation output data is permitted to leave organisation network. Simulation occurs on local cluster, simulations outputs are stored on local server.

Acceptance criteria

Out of scope

Implementation notes

• Potentially use rsync in place of https://rclone.org
• See #8 and #28 for related cloud storage tickets
• Requires local storage server with exposed endpoints to middleware.