docs(architecture): add interaction memory KG schema design (#442)
Design doc at docs/architecture/interaction-memory-schema.md extending
FactKnowledge with interaction tracking. FactMetadata enum on existing
BTreeMap, 5-state InteractionState (Active/Completed/WalkedAway/
Confrontation/ConflictAbandoned), monologue prerequisite extension.
Includes entity slug resolution approach, NpcTolerance reconciliation,
and fact decay exemption documentation.
Ref: D-041, D-064, D-063
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.6
087ff67bfb