reproducible debian: schedule: also report the salsa_username to be saved

The only reason we care here is because there are protections in place
to prevent mass scheduling from single users, and identifying the users
with the salsa username makes it possible to workaround said
protections.

Also, the scheduling users is logged on IRC.

Assume people are good.

Signed-off-by: Mattia Rizzolo <mattia@debian.org>