Contract 3.5.0

elixir_timeline: arena_changed items carry facts.promoted_by when the record holds the crossing - the win whose result first reached the new arena's floor: opponent {player_tag, name, starting_trophies}, crowns, crowns_against, trophy_change, trophies_after, arena_floor - and the item's at is that battle's instant (timing exact) rather than the profile poll's. Absent means the record does not hold the crossing; never a guess. Clan standouts.arena_promotions gain over and score alongside arena. Additive; no other tool changes shape.