User leaderboard return data has irrelevant data

[Fursum]

Currently, we use the user id to generate their cards. Those ids are fetching their user data individually.
The current return is this:

type LeaderboardResponse = {
  id: number;
  user_name: string;
  profile_picture: string;
  ranked_map_count: number;
  influence_count?: number;
};

We only need the id and probably influence count. We could access the influence count from the user data so it is not mandatory. Would be nice to have though.
An alternative is to have all of the base user data to immediately render the users.

Proposed return type:

type LeaderboardResponse = {
  id: number;
  influence_count: number;
};