Fix ctx.time() (#138)

Author: slinkydeveloper

python/restate/server_context.py

@@ -534,7 +534,8 @@ def uuid(self) -> UUID:
         return UUID(int=self.random_instance.getrandbits(128), version=4)
 
     def time(self) -> RestateDurableFuture[float]:
-        return self.run_typed("timestamp", time.time)
+        # pylint: disable=W0108
+        return self.run_typed("timestamp", lambda: time.time())
 
     # pylint: disable=R0914
     async def create_run_coroutine(self,