mimi_governance_binding_mismatch· reason_code· applies to service_call, state_resolutionA MIMI facade found a governance binding, but its authenticated GroupInfo/GroupContext group id, room-binding group id, group id derived from current accepted MlsGroupCurrent.effective_scope, fixed binding fields, provider DID or target Realm/Strand do not agree. Receiver MUST quarantine or reject with zero projection writes. See zh/extensions/mimi-interop.md §4.1.