OptionalContextThe MJ user the replacement runs as — the same one that owned the browser that died.
OptionalInstanceWhich browser within the agent session faulted (#3531). Omitted is the single unnamed instance.
OptionalProviderExplicit backend provider name; when omitted the single Active provider is used.
Parameters for RemoteBrowserEngine.RecoverDeadAgentSession — everything a relaunch needs that the fault itself cannot say.