pub fn format_item_summary(item: &ZoteroItem, citekey: Option<&str>) -> StringExpand description
Format a ZoteroItem as a concise text summary.
Output format matches the Python MCP server for consistency:
**citekey**
Title of the Paper
Author1, A.; Author2, B.
(2024)
[journalArticle]
DOI: 10.1234/example