A stream entry takes `last-per-subject`, and process.Account.HearStream reads a module's own stream kept so whole through an ordered
consumer before following its durable, as HearSeatEvents does for a seat's event.
Builds: design 47 G §703, §556, A-181
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h