chore(ci): Re-enable codspeed runner (#11120)

* re-enable codspeed runner

* dummy change

* add readme entry

* do not run codspeed in forks

* set node version

* also set up node

* fix link

src/backend/InvenTree/manage.py

@@ -17,6 +17,7 @@ def main():
             'available on your PYTHONPATH environment variable? Did you '
             'forget to activate a virtual environment?'
         ) from exc
+
     execute_from_command_line(sys.argv)