Resolve the AdCP preview authority order without executing side effects.
Placement-scoped candidates fail closed unless their placement ID exactly
matches the target. Representative seller output is returned only as a
secondary view; it is never inserted into the authoritative chain.
Resolve the AdCP preview authority order without executing side effects.
Placement-scoped candidates fail closed unless their placement ID exactly matches the target. Representative seller output is returned only as a secondary view; it is never inserted into the authoritative chain.