AI gate D5: report-baseline reply timeouts surface as ReplyTimedOut{History} with the report request id

[faratech]

The report baseline comparison runs on the history worker, so its timeout is attributed to History while the request id belongs to the report - mildly misleading for hosts; generation still proceeds correctly (R5-F5-3).
Decision needed: accept the attribution quirk vs extend WorkerKind.

[faratech]

Decision needed (owner): accept vs extend WorkerKind with a Report variant.

[faratech]

Ruling recorded: accept the attribution quirk.