Backend Refactoring Sprint 6

[mOceanracing]

Epic: [^1]

• [#100]

Tasks: [^2]

• [x] #101
• [x] #118
• [x] #119
• [x] #126
• [x] #127

[^1]: The Epic to which this User Story belongs should be attached to specify the context and navigate on it.

[^2]: All Tasks belonging to the User Story should be listed to get an overview and to be able to navigate to them.