V3 deterministic PDF image-inventory capability pack. By-value connector composition (service_kind=cli, no separate ingredient): the local Poppler pdfimages CLI exposes readiness, full-document embedded-image inventory, fixed first-page image inventory, and bounded first-N-pages image inventory for one trusted local PDF path. This pack deliberately ships inventory modes only, not bulk image extraction, because pdfimages extraction writes one file per image and v1 output_capture expects exactly one produced file. The operations are path-based stdout text for the same reason as pdfinfo: the current CLI safety contract forbids materialized file_ref input with stdout value capture. It exposes no password arguments, image-root output prefix, extraction format flags, stdin mode, shell wrapper, arbitrary flags, or network egress. Requires pdfimages on PATH (Debian/Ubuntu: apt install poppler-utils; macOS: brew install poppler).