Contract 0.22.0

Clan Pulse: a daily clan_pulse feed event per added clan (24h battle activity, top players, members quiet >=5 recorded days, war-day deck counts, roster changes - facts, never judgments) plus a real-time war_day_open event when a new war day is first observed. war_current gains decks_today: named untouched/partial/finished lists for the current war day - the nudge list. Built for scheduled agent clan-management routines: read elixir_events from your cursor, drill with war_current and clans_roster.