Persistence and optional SaveGame integration

Review draft. This source page has not completed website editorial and release-specific verification.

Character State owns its typed persistence snapshot, capture, validation, restore, and dormant-state semantics. These APIs remain available from the standalone CharacterState owner plugin and do not depend on a save system.

SaveGame adaptation is an optional DirectorBridge integration. The retired ActorComponents pairwise SaveGame bridge is no longer a supported product. Removing that adapter does not change the Character State persistence schema or gameplay behavior; save orchestration and storage remain outside the owner.