Validate an update received from the cross-instance message bus.
The bus carries messages from other processes, so every field is type-checked before the update
is republished onto the local topic, where StatusUpdatesFilter compares ownerUserId
with the connection's user.
Parameters
raw: string
The JSON text taken off the bus.
localServerId: string
This process's MJGlobal.ProcessUUID, used to drop our own echo.
Validate an update received from the cross-instance message bus.
The bus carries messages from other processes, so every field is type-checked before the update is republished onto the local topic, where StatusUpdatesFilter compares
ownerUserIdwith the connection's user.