Rework/Refactor: update the mongo interface

[thelazurite-cell]

The mongo interface heavily relies on event chains, resolve by using new Promise and resolve where possible over subscriptions as this is getting messy and could be using too much memory.

Acceptance Criteria

• Must have unit tests

[thelazurite-cell]

Backend needs rewriting; too messy. began work on a C# WebApi Solution for this instead.

[thelazurite-cell]

All that's needed now is the Unit Tests