fn identifiers(turns: &[Turn]) -> Vec<String>Expand description
PR and issue numbers, URLs, file paths and commit ids from the record, deduplicated and newest first (§4.4: “exact identifiers survive verbatim … extracted deterministically … not paraphrased by the summarizer”). The running summary sometimes attaches the right commit to the wrong PR; this list is what it can be checked against. Extracted from redacted text, so a credential inside a URL never makes the list.