mimi_room_binding_migration_proof_invalid· reason_code· applies to state_resolutionA structurally valid ak.mimi.room_binding Event carries migration fields on another transition, its committed Event/RealmCommit lineage is not the same-room adjacent accepted->migrating current source, its asserted topology conflicts with the selected outcome, or its target MLS group conflicts with current accepted authenticated public state. Authority Event admission MUST reject with zero durable effects; missing or unpaired fields fail schema_violation first. See zh/extensions/mimi-interop.md §4.2.