add assert message in future callback
Add a message to help investigate CI failures for single-uring configurations like: https://gitos.rrze.fau.de/i4-old/manycore/emper/-/jobs/574828
Add a message to help investigate CI failures for single-uring configurations like: https://gitos.rrze.fau.de/i4-old/manycore/emper/-/jobs/574828