feat: improve on data privacy

main.py

@@ -62,7 +62,11 @@ def add_players(players: list[Player]):
 def list_players():
     with Session(engine) as session:
         statement = select(Player).order_by(Player.display_name)
-        return session.exec(statement).fetchall()
+        players = session.exec(statement).fetchall()
+        return [
+            player.model_dump(include={"id", "display_name", "number"})
+            for player in players
+        ]
 
 
 def list_teams():