Update Duration API to use from_seconds() builder method

- Change Duration.seconds(5) to Duration.from_seconds(5)
- Aligns with Duration refactoring in main SDK

Author: FullyTyped

tests/e2e/basic_success_path_test.py

@@ -3,6 +3,7 @@
 import json
 from typing import Any
 
+from aws_durable_execution_sdk_python.config import Duration
 from aws_durable_execution_sdk_python.context import (
     DurableContext,
     durable_step,
@@ -58,7 +59,7 @@ def function_under_test(event: Any, context: DurableContext) -> list[str]:
         result_one: str = context.step(one(1, 2))
         results.append(result_one)
 
-        context.wait(seconds=1)
+        context.wait(duration=Duration.from_seconds(5))
 
         result_two: str = context.run_in_child_context(two(3, 4))
         results.append(result_two)