Four cited reference files distilled from live-verified research against
openlibrary.org developer docs: OL...M/W/A key graph with merge-stub behavior,
search query syntax and error model, ISBN 302 redirect resolution and covers
host rules, plus worked curl/jq pipelines with a symptom-indexed gotcha table.
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
Magnus Hedemarkandfactory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>