vsearch/search are documented as vector/lexical-only modes, but
runQmdSearchViaMcporter omitted `rerank` from the query tool callArgs,
so QMD's query tool (which defaults rerank:true) ran the LLM reranker
anyway. Pass rerank:false for those modes; full "query" mode keeps it.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>