Is the format of the json-stream documented somewhere? I've tried to follow the code and it appears to be a serialization of a https://docs.pytest.org/en/7.1.x/reference.html#_pytest.reports.TestReport object (or any of the other BaseReport). Is this correct? In that case can that be clarified in documentation? Also curious if there is any ambition to document the serialized form of the json, or is the reference to the TestReport object enough?