Module errors 

Failure surfaces of compaction and snapshot validation.

Enums

CompactionError

Failure surface of CompactionStrategy::compact (and therefore of ContextManager::compact_if_needed).

FromMessagesError

Returned by ConversationSnapshot::new and ContextManager::from_messages when the supplied parallel vectors are inconsistent. Surfaces at restore time so a malformed snapshot fails loudly instead of corrupting state silently.