Release v7.88.0

Changed

• The Stage rendering admission reference states what the renderer now takes in projections: a constant key at the root of a scope, running totals (zero start, optional totals, concept-to-number and concept-to-concept conversions, what is still refused), the event source identity in a block keyed by an event property, joins inside children, events declared in a state-view slice, and commands that append to several event sources