pub fn check_observer_floor(
operation: ObserverCheckedOperation,
observer_progress: DeliverySeq,
cap_floor: u128,
) -> ObserverFloorDecisionExpand description
Applies the observer hard-retention selector to a protocol-computed floor.
The comparison is widened before checked one-past progress is formed.
Equality passes. A strict excess returns the exact operation-specific
ObserverBackpressure with an initial refusal epoch equal to current
observer progress.