Selected inbound-record summary header.

Sibling of MailglassAdmin.Operator.DetailHeader (the design contract). Receives the detail read-model map %{record: %InboundRecord{}, mailbox:, outcome:, outcome_reason:, evidence:} from the internal inbound detail gateway.

CRITICAL (Pitfall 2): the :suppression_flagged field does NOT exist on any this milestone phase schema — it lands in this milestone phase. The flag is read with Map.get(record, :suppression_flagged, false), NEVER via dot-access on a missing struct key (which raises KeyError). The IOPS-05 copy renders only when the flag is truthy, so it is forward-compatible scaffolding that simply never renders until this milestone phase.