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

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

test(discovery): end-to-end errand_runner session emits discovery metric

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

feat(discovery): parse SELF: report + score self_correct in make_turn_trace

feat(discovery): TurnTrace self_belief/self_correct + Scenario discovery hooks