Function fetch_paragraph_related_summaries 

pub async fn fetch_paragraph_related_summaries(
    conn: &mut SqliteConnection,
    paragraph_id: i64,
) -> Result<Vec<ParagraphSummary>, Error>

段落に紐づいた要約を段落idから取得します。

SELECT *
FROM paragraph_summaries
WHERE paragraph_id = ?
ORDER BY summary_pos NULLS LAST;