refactor: Lazy load celery_app in __getattr__ to improve module attribute access and reduce initial import overhead.

dispatcharr/__init__.py

@@ -1,6 +1,11 @@
 # dispatcharr/__init__.py
 
-# For Celery:
-from .celery import app as celery_app
-
 __all__ = ("celery_app",)
+
+
+def __getattr__(name: str):
+    if name == "celery_app":
+        from .celery import app as celery_app
+
+        return celery_app
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")