📚 040 RAG Service

Vector storage for chat RAG and Athena knowledge base.

Endpoints

• POST /rag/chunks — create chunk
• POST /rag/search — vector search (cosine)
• DELETE /rag/chunks/{id} — delete chunk
• POST /knowledge/chunks — Athena KB add
• POST /knowledge/search — Athena KB search
• GET /health — service status