Drive the eval-doc-investigator CLI (~/git/eval-doc-investigator) to run an exhaustive, source-grounded, eval-driven investigation over a folder of documents. Use when the user wants to search/scan a document corpus for a topic and needs every finding traced to a verbatim source quote, verified against the source, scored by confidence, and reported with VERIFIED / REVIEW_NEEDED / LOW_CONFIDENCE / REJECTED separation — NOT a chatbot answer. Trigger phrases: "investigate these documents", "search this corpus for X", "find every mention of … with evidence", "audit this folder of docs", "eval-driven document analysis", "doc investigator", "/doc-investigator". Local-only by de…