V3 deterministic PDF information capability pack. By-value connector composition (service_kind=cli, no separate ingredient): the local Poppler pdfinfo CLI exposes readiness, basic document/page information, page-box bounding boxes, document-level metadata stream output, and URL annotation listing for one trusted local PDF path. This pack deliberately exposes path-based stdout helpers, not file_ref materialization, because the current CLI safety contract forbids materialized file_ref input with stdout value capture. It exposes no password arguments, JavaScript dump, tagged-structure dump, arbitrary pdfinfo flags, stdin mode, shell wrapper, output-file path, or network egress. Requires pdfinfo on PATH (Debian/Ubuntu: apt install poppler-utils; macOS: brew install poppler). Local and no-egress.