GOAL and WATCH read the metric registry, and a watch gets a direction — CharterItems validates metricKey by MetricRegistry and takes WATCH traitChoice WORSE|BETTER|EITHER (EITHER stored NULL); WatchRule.direction (7-arg constructor = EITHER); the resolver, profile view and stamp carry it (W| line gains |<direction> only when not EITHER); WatchKeys keys by it (KamoCollab CP14 Task 5)