P-8: End Scene (Canonization)

[spuentesp]

Use Case: End Scene (Canonization)

Actor: User/Orchestrator
Trigger: Scene reaches conclusion (user command or narrative)

Flow:

1. Detect scene end trigger
2. Collect all ProposedChanges from scene
3. CanonKeeper evaluates each proposal
4. Commit approved changes to Neo4j
5. Update entity states
6. Generate scene summary
7. Index scene to Qdrant for retrieval
8. Mark scene as completed in MongoDB
9. Prompt: Continue to next scene or end story?

Critical: Only CanonKeeper writes to Neo4j

See docs/USE_CASES.md for full implementation details.