[Feature]: Assert on events for examples

[wangyb-A]

What would you like?

Currently we do manually asserts in integration tests.

We should be able to:

1. Generate events from local runner
2. Assert current events with the events in the json file

Possible Implementation

No response

Is this a breaking change?

No

Does this require an RFC?

No

Additional Context

No response

[yaythomas]

Similar to the JS Testing library here: https://github.com/aws/aws-durable-execution-sdk-js/tree/main/packages/aws-durable-execution-sdk-js-examples

Each integration test has a .history.json file with the expected event history, and the output from the test runner (whether cloud or localrunner) asserts against that.