fix(sdk): fix timestamp format for checkpoint

- fix timestamp for execution succeed and fail

Author: Alex Wang

src/aws_durable_execution_sdk_python/lambda_service.py

@@ -495,7 +495,7 @@ def create_context_fail(
     def create_execution_succeed(cls, payload: str) -> OperationUpdate:
         """Create an instance of OperationUpdate for type: EXECUTION, action: SUCCEED."""
         return cls(
-            operation_id=f"execution-result-{datetime.datetime.now(tz=datetime.UTC)}",
+            operation_id=f"execution-result-{int(datetime.datetime.now(tz=datetime.UTC).timestamp() * 1000)}",
             operation_type=OperationType.EXECUTION,
             action=OperationAction.SUCCEED,
             payload=payload,
@@ -505,7 +505,7 @@ def create_execution_succeed(cls, payload: str) -> OperationUpdate:
     def create_execution_fail(cls, error: ErrorObject) -> OperationUpdate:
         """Create an instance of OperationUpdate for type: EXECUTION, action: FAIL."""
         return cls(
-            operation_id=f"execution-result-{datetime.datetime.now(tz=datetime.UTC)}",
+            operation_id=f"execution-result-{int(datetime.datetime.now(tz=datetime.UTC).timestamp() * 1000)}",
             operation_type=OperationType.EXECUTION,
             action=OperationAction.FAIL,
             error=error,

tests/lambda_service_test.py

@@ -686,9 +686,12 @@ def test_operation_update_create_wait_start():
 @patch("aws_durable_execution_sdk_python.lambda_service.datetime")
 def test_operation_update_create_execution_succeed(mock_datetime):
     """Test OperationUpdate.create_execution_succeed factory method."""
-    mock_datetime.datetime.now.return_value = "2023-01-01"
+
+    mock_datetime.datetime.now.return_value = datetime.datetime.fromtimestamp(
+        1672531200.0, tz=datetime.UTC
+    )
     update = OperationUpdate.create_execution_succeed("success_payload")
-    assert update.operation_id == "execution-result-2023-01-01"
+    assert update.operation_id == "execution-result-1672531200000"
     assert update.operation_type == OperationType.EXECUTION
     assert update.action == OperationAction.SUCCEED
     assert update.payload == "success_payload"