Contract 7.1.7

From the Elixir Gym's clan-leader journey and its fifth run on the timeline (feedback #263-#274).

• A boat DEFENSE is not the member's war battle: an enemy attacked the clan's boat and the defense deck answered. war_history's days battled and clans_participation's war days leave defenses out, and compact battles_query keeps boat.side so a sweep can tell attack from defense (#263).
• clans_roster first_observed_in_clan is the member's first stint in the clan, with rejoined_observed_at for a member who left and came back; the joined-mid-window note no longer counts a rejoiner's earlier battles in this clan (#264).
• elixir_timeline member reads name the member on their sessions, serve whole sittings of two or more battles from the day-wide fetch, and never move the read pointer (#265, #269, #270, #271).
• On a training day of the week in progress, a clan entry's war fame and place are null: no race day has run (#266). The quiet summary names each member at their own days quiet (#267).
• Presence items keep a second absence at the same rung and every return, derived from the battle gaps inside the window (#272). The timeline's from/to and page say (from, to] and document the member read and the activity counts (#273).

Additive; war-day counts drop by the defenses they had counted.