Weekly flatpak fails on startup

[SqAtx]

Traceback (most recent call last):
  File "/app/bin/gtg", line 98, in <module>
    from GTG.gtk.application import Application
  File "/app/lib/python3.11/site-packages/GTG/gtk/application.py", line 30, in <module>
    from GTG.core.datastore import Datastore
  File "/app/lib/python3.11/site-packages/GTG/core/datastore.py", line 30, in <module>
    from GTG.core.tasks import TaskStore, Filter
  File "/app/lib/python3.11/site-packages/GTG/core/tasks.py", line 35, in <module>
    from GTG.core.base_store import BaseStore, StoreItem
  File "/app/lib/python3.11/site-packages/GTG/core/base_store.py", line 29, in <module>
    from typing_extensions import Self
ModuleNotFoundError: No module named 'typing_extensions'

The requirement was added in 908da7d

The last working weekly flatpak is 0.7-dev-20241206

#1178 is attempting to fix this, but isn't currently working.