Constant MAX_FACTS_PER_CLASS 

pub const MAX_FACTS_PER_CLASS: usize = 256;

Admission cap on stored facts per producer for the producer-signed class, and per (producer, origin) for the registry-attested class. Reached only by a producer with a genuinely large revocation history, or a registry padding results. Stored facts are never removed; a fact refused here still applies to the call that found it, and the slot stops minting markers.