Transitions the backend to celery and celery beat

src/paperless/__init__.py

@@ -1,5 +1,11 @@
+from .celery import app as celery_app
 from .checks import binaries_check
 from .checks import paths_check
 from .checks import settings_values_check
 
-__all__ = ["binaries_check", "paths_check", "settings_values_check"]
+__all__ = [
+    "celery_app",
+    "binaries_check",
+    "paths_check",
+    "settings_values_check",
+]