- services/rag: knowledge_docs store — vector search via the shared
embedder (HNSW index, graceful ILIKE fallback), list/delete scoped to
the user, search intentionally global for the single-user deployment
- gateway: GET/POST /knowledge/docs, DELETE /knowledge/docs/:id,
POST /knowledge/search
- plugins/knowledge: knowledge_search and knowledge_ingest tools so the
persona can save and recall information mid-conversation
- main: migrations, store wiring, plugin registration
