fix: citation toggle stopPropagation + absolute UPLOAD_DIR path

fix: replace startswith with is_relative_to() for path traversal security

feat: add GET /api/files/{filename} route for citation PDF links

feat: async embed upload — return 202 immediately, poll status for stage labels

fix: OOM guard — skip web search during contextual refresh + psutil memory logging

feat: multi-workspace backend — workspace_id routes ChromaDB collections + BM25 dict

feat: rebrand FinRAG → Prism (collection names, system prompt, UI branding)

feat: Migrate LLM to Groq, fix web search pipeline, add structured logging

feat: Add RAGAS eval, score passthrough, docs, and hybrid retrieval config

feat: Add hybrid retrieval with BM25, RRF fusion, and cross-encoder reranker

Use CORS regex to allow all vercel deployment'

frontend changes

Add Dockerfile and Render config