feat(fetchers): add ArXivFetcher for paper metadata and abstract#68
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feat(fetchers): add ArXivFetcher for paper metadata and abstract#68
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Closes #57 — Adds a fetcher for arXiv paper URLs, returning structured metadata via the arXiv API. Matches arxiv.org/abs/{id} and arxiv.org/pdf/{id}. Returns title, authors, abstract, categories, dates, DOI, and links to PDF/HTML versions. Uses simple XML parsing to avoid new dependencies. Format: "arxiv_paper".
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What\nAdds an
ArXivFetcherfor arXiv paper URLs, returning structured metadata via the arXiv API.\n\nCloses #57\n\n## How\n- Matchesarxiv.org/abs/{id}andarxiv.org/pdf/{id}\n- Fetches via arXiv Atom XML API, parsed with simple string extraction (no XML dependency)\n- Returns title, authors, abstract, categories, dates, DOI, links to PDF/HTML\n- Format:\"arxiv_paper\"\n\n## Risk\n- Low\n\n### Checklist\n- [x] Unit tests passed\n- [x] Clippy clean\n- [x] Formatting applied