Verify: Knowledge, RAG & Memory capabilities #9875

Verify the Knowledge, RAG & Memory capabilities in the Capability Catalog.

• Graph-RAG hybrid search (Shipped) — docs/planning/issue-55-complete-summary.md
• Graph entity extractor (Shipped) — docs/planning/issue-55-complete-summary.md
• Memory graph semantic search (Shipped) — docs/design/MEMORY_GRAPH_SEMANTIC_SEARCH.md
• Enhanced memory manager (Shipped) — docs/implementation/PHASE_7_MEMORY_ENHANCEMENT.md
• RAG optimization suite (Planned) — docs/planning/RAG_Optimization_Implementation_Plan.md
• Neural Mesh RAG (Design) — docs/archives/plans/2026-03-22-neural-mesh-rag-design.md
• Individual document vectorization (Partial) — docs/design/individual-document-vectorization-ux-spec.md
• Knowledge-enhanced chat (Partial) — docs/features/knowledge_chat_integration.md
• MCP knowledge-base tools (Shipped) — docs/features/mcp-knowledge-base-integration.md
  Each item — locate design doc → backend reachable (evidence) → frontend wired to real API (if applicable) → end-to-end matches design (evidence) → correct the Catalog status → promote to INDEX/MOC if shipped, else move design doc to archives/. Full template: Verify surfaced capabilities & consolidate feature docs into a single home #9872.

Registry: docs/features/CATALOG.md · Part of #9872