add classify_text tool (#23)

fix: link to CLI repo only

cross-link with CLI repo

remove unused files

upgrade default models to v5 embeddings and v3 reranker

fix: resolve 525 SSL errors for rerank/embeddings API calls

fix: dead timeout in parallel search, silent error drop in parallel read

fix: race condition causing auth failures with concurrent requests

feat: add search_bibtex tool for academic citations

feat(mcp): add server instructions for tool discovery

fix(cors): add exposeHeaders for mcp-session-id

feat(extract_pdf): add type filter and limit to 20 floats per response

feat: add extract_pdf tool for extracting figures/tables/equations from PDFs

docs: add --transport http flag for Claude Code

docs: move upgrade warning before claude add command