Release v4.173.0

Added

• Commands whose individual productions name their own event source, stream or stream id (produces ... to <stream>) now run in specifications and the semantic Host, and render to Arc commands that append each event to the route the model names. (#262)

Changed

• Two production route shapes are still refused with STAGE-ESM-036 until they are proven equivalent to the reference: an override onto an unkeyed stream under a keyed command route, and an override whose literal stream id is Default.