fix: update StartDate to StartTimestamp and StopDate to EndTimestamp#14

bchampp merged 1 commit intomainaws/aws-durable-execution-sdk-python-testing:mainfrom

fix/update-start-date-to-start-timestampaws/aws-durable-execution-sdk-python-testing:fix/update-start-date-to-start-timestampCopy head branch name to clipboard