Improve e2e tests

_Continuation from https://github.com/OpenPathfinder/visionBoard/pull/229_

**Objectives**

- [ ] breaking down large tests into smaller focused tests
- [ ] play with the fixtures and database to test more possibilities like empty tasks, no alerts, no scorecard results....

**Notes**

Once the openpathfinder/visionboard-cli#1 is completed the fixture will be in place to do this one