improve decorate_all_methods to skip dunder methods

Author: amirreza8002

django_valkey/base.py

@@ -33,11 +33,14 @@
 def decorate_all_methods(decorator):
     def decorate(cls):
         for attr in vars(cls):
+            # dunders and `get` should not be decorated
+            # get is handled by `_get`
+            if attr.startswith("__") or attr in {"get", "get_or_set"}:
+                continue
+
             attribute = getattr(cls, attr)
             if callable(attribute):
-                if attr == "get" or attr == "get_or_set":
-                    continue
-                elif attr == "_get":
+                if attr == "_get":
                     setattr(
                         cls,
                         attr,