Make Durable Object properties enumerable and configurable

Previously, properties added to the Durable Object receiver were not enumerable, writable, or configurable by default. This change ensures these properties have full flexibility, improving compatibility and developer experience.

Author: cod1k

packages/cloudflare/src/durableobject.ts

@@ -261,6 +261,9 @@ function instrumentPrototype<T extends NewableFunction>(
       });
       Object.defineProperty(receiver, prop, {
         value: instrumented,
+        enumerable: true,
+        writable: true,
+        configurable: true,
       });
       return instrumented;
     },