Add tests for // TODO test comments; remove resolved TODOs

[Copilot]

Several // TODO test comments existed in rating-service.ts, team-service.ts, and application-controller.ts with no corresponding coverage. This adds the missing tests and removes the now-resolved TODO comments.

New tests

rating-service.spec.ts — getUsersRatingsForProject

• Returns only ratings matching the given project + user
• Returns empty when no ratings exist, or when ratings belong to another user or project

team-service.spec.ts — expanded coverage

• createTeam: owner is set to the creator; user's team field is assigned
• acceptUserToTeam: only owner or root admin may accept; others throw
• removeUserFromTeam: users can remove themselves; removing the owner throws; success nullifies team
• setOwner: non-owner/non-admin throws; target not in team throws; success updates owner

application-controller.spec.ts — new file

• getAllTeams: email addresses are absent from the serialized response (simulates ResponseInterceptor with classToPlain + excludeAll; UserResponseDto only exposes id, firstName, lastName)

Cleanup

All 11 // TODO test comments across the three source files have been removed.