Function group_analysis_results 

pub fn group_analysis_results(
    results: &AnalysisResults,
    root: &Path,
    resolver: &OwnershipResolver,
) -> Vec<ResultGroup>

Partition analysis results into groups by ownership or directory.

Each issue is assigned to a group by extracting its primary file path and resolving the group key via the OwnershipResolver. Returns groups sorted alphabetically by key, with (unowned) last.