Refactor celery.py to enhance type hinting

config/celery.py

@@ -1,11 +1,43 @@
 import os
+from typing import TYPE_CHECKING
 
 from celery import Celery
+from celery import Signature
+from celery.app.task import Task
+from celery.contrib.abortable import AbortableAsyncResult
+from celery.contrib.abortable import AbortableTask
+from celery.contrib.django.task import DjangoTask
+from celery.local import class_property
+from celery.result import AsyncResult
+from celery.utils.objects import FallbackContext
+
+if TYPE_CHECKING:
+    from config.settings import Any
+
+
+classes = [
+    Celery,
+    Task,
+    DjangoTask,
+    AbortableTask,
+    AsyncResult,
+    AbortableAsyncResult,
+    Signature,
+    FallbackContext,
+    class_property,
+]
+
+for cls in classes:
+    setattr(  # noqa: B010
+        cls,
+        "__class_getitem__",
+        classmethod(lambda cls, *args, **kwargs: cls),  # noqa: ARG005
+    )
 
 # Set the default Django settings module for the 'celery' program.
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
 
-app = Celery("config")
+app: Celery[Task[Any, Any]] = Celery("config")
 
 # Using a string here means the worker doesn't have to serialize
 # the configuration object to child processes.