Data quality checks should more carefully skip MDC events
DQ checks are supposed to skip MDC events (https://git.ligo.org/emfollow/gwcelery/-/blob/main/gwcelery/tasks/detchar.py?ref_type=heads#L447), but this doesn't happen completely cleanly since we leave a log message in between the first DQ check and the second, which doesn't get skipped: https://git.ligo.org/emfollow/gwcelery/-/blob/main/gwcelery/tasks/orchestrator.py?ref_type=heads#L108-118
This can be confusing, such as in https://gracedb.ligo.org/superevents/MS240416n/view/ message 18.
Relatedly, we attempt to produce omegascan these MDC events, but I don't know if we need to.