vote: Change graph display condition, don't fetch for admin

Now, the graph will only show when everyone has voted and the week is no longer
the last one active.
This is to minimize information gathering by looking during voting.

Don't fetch the vote data for the admin : it is not used, so no need to
query the database.

Update README with new TODOs and clean up main includes a bit.

src/auth.rs

@@ -86,7 +86,8 @@ pub async fn get_user(week: u8, db: &mut Connection<Db>, cookies: &CookieJar<'_>
         (String::new(), false)
     };
 
-    let votes: Vec<Vote> = if logged_in {
+    // TODO: Move to src/vote.rs
+    let votes: Vec<Vote> = if logged_in && !is_admin {
         sqlx::query_as("SELECT Votes.* FROM Votes JOIN Truths ON Votes.truth_id == Truths.id AND Truths.week == $1 WHERE voter_id == $2 ORDER BY Truths.number;")
             .bind(week)
             .bind(&id_str)