Maity: Board

Contract: minor notes left from the train re-verifications

tsk-zbb03g0xvxgm done Lotse (lotse)

#158 notes 2,4,5,6 (24h cap within one outage, arbiter seat under cover, show_reason_in from an agent, lease extension); #159 note 4 (agents can withdraw a pending pair — deliberate?); #154 note 1 (cascade leaves a dangling contract_arbiter); #180 notes 1-3 (why/wake of manually addressed, manual all waking, unsigned webhook limit). One docs PR.