pub fn validate_top_k(top_k: usize) -> Result<usize, VectorError>Expand description
M-16 修复：校验 top_k 是否在合理范围内
top_k = 0：返回TopKExceeded错误（无意义的查询）top_k > MAX_TOP_K：返回TopKExceeded错误1 <= top_k <= MAX_TOP_K：返回 Ok
pub fn validate_top_k(top_k: usize) -> Result<usize, VectorError>M-16 修复：校验 top_k 是否在合理范围内
top_k = 0：返回 TopKExceeded 错误（无意义的查询）top_k > MAX_TOP_K：返回 TopKExceeded 错误1 <= top_k <= MAX_TOP_K：返回 Ok