refactor: flatten app/scoreboard/ subpackage and rename files for clarity

tests/conftest.py

@@ -81,10 +81,10 @@ def flask_client(tmp_path, monkeypatch):
 
     # Patch module-level path constants so no reloads are needed
     import app.routes as routes
-    import app.scoreboard.process_data as process_data
+    import app.games as games
 
     monkeypatch.setattr(routes, "SCOREBOARD_DATA_FILE", str(scoreboard_file))
-    monkeypatch.setattr(process_data, "DB_PATH", str(db_path))
+    monkeypatch.setattr(games, "DB_PATH", str(db_path))
 
     from app import app as flask_app