feat: add ty type checking support and fix type issues

- Add ty.toml configuration with Django project root
- Add py.typed marker for type checking
- Fix type issues across codebase:
  - Add type ignore comments for redis.exceptions imports
  - Fix django.db.models.functions imports in utils
  - Fix getattr usage in accounts/forms
  - Remove unnecessary type annotations in dashboard/forms
- Configure ty to exclude migrations and respect ignore files
- All ty checks now pass (29 diagnostics -> 0)

dashboard_project/__main__.py

@@ -17,7 +17,7 @@ def main():
     # Default to 'manage.py' if no specific command
     if cmd_name == "__main__":
         # When running as `python -m dashboard_project`, just pass control to manage.py
-        from dashboard_project.manage import main as manage_main
+        from dashboard_project.manage import main as manage_main  # type: ignore[import-not-found]
 
         manage_main()
         return
@@ -48,5 +48,32 @@ def main():
     execute_from_command_line(sys.argv)
 
 
+def runserver():
+    """Entrypoint for running Django development server."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dashboard_project.settings")
+    sys.argv = ["manage.py", "runserver", "8001"]
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)
+
+
+def migrate():
+    """Entrypoint for running Django migrations."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dashboard_project.settings")
+    sys.argv = ["manage.py", "migrate"]
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)
+
+
+def shell():
+    """Entrypoint for Django shell."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dashboard_project.settings")
+    sys.argv = ["manage.py", "shell"]
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)
+
+
 if __name__ == "__main__":
     main()