Returns one finding per checkpoint-verify mismatch signal strictly newer than
sinceExclusive, matching both channels: the verify metric with a mismatch outcome and the
mismatch log event. No threshold — a single mismatch is an incident. The caller advances its
watermark to the newest at so an episode is handled once.
Returns one finding per checkpoint-verify mismatch signal strictly newer than
sinceExclusive, matching both channels: the verify metric with a mismatch outcome and the mismatch log event. No threshold — a single mismatch is an incident. The caller advances its watermark to the newestatso an episode is handled once.