The following python code prints 1023 instead of 10024.

    msg = b"X"*10024
    lib.mongocrypt_status_set(
        status, lib.MONGOCRYPT_STATUS_ERROR_CLIENT, 1, msg, -1)
    msg2 = _to_string(lib.mongocrypt_status_message(status, ffi.NULL))
    print(len(msg2))

It appears that mongocrypt_status_set truncates the message to 1023 bytes. I propose we document this limitation or increase the max message size.

My use case is that I want to save a python stack trace as the message. Later I want to be able to retrieve and display the full trace. 1023 is too small for a lot of failures, especially when they happen in a deeply nested function.