feat(errand): no move limit — ends only on reaching the house (analysis) or zero health

feat(errand): surface grass-cut/avoid + pedestrian-touch in results; grass breaks civic/outlaw persona tie

fix(errand): honest results summary — None for unmeasured metrics, document persona tie + approximate fields

feat(errand): results summary (event choices, closest persona, headline metrics) in review

feat(web): expose health + turns_left in InteractiveSession.state()

feat(discovery): source available actions from scenario.action_set (interact reaches the agent)

refactor: restructure proteus into game/web subpackages