SessionStatus.metadata contains additional metadata about the test status update.
Each additional property must conform to the following schema
Provides information about the status of the container at the point the test status update was sent.
No Additional PropertiesSpecifies whether the container has started at the point the test status update was sent.
Specifies whether the container has started at the point the test status update was sent.
Specifies whether the container has died at the point the test status update was sent.
Specifies the exit code of the container if it has already died.