AAI-166 registration endpoint for Galaxy

[marius-mather]

Description

AAI-166: endpoint in the backend that accepts data from our frontend registration form, and makes a request to the Auth0 management API to create/register a new user.

It seems like we probably want some basic protection around this API, so have added basic JWT verification so we don't just get spammed with register requests from bots.

Changes

• Add a /galaxy/register endpoint
• Add JWT protection for the register endpoint
• Add CORS protection - needed for the frontend to use data from the backend
• Tests for registration functions

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have added unit / integration tests that prove my fix is effective or that my feature works
• I have run all tests locally and they pass
• I have updated the documentation (if applicable)

How to Test Manually (if necessary)

Run uv run pytest

[amandazhuyilan]

Not sure if its ready for review yet but so far so good

[amandazhuyilan]

Looks good - thanks for raising the test coverage :P