Function export_ownership_graph_json 

pub fn export_ownership_graph_json<P: AsRef<Path>>(
    base_path: P,
    allocations: &[AllocationInfo],
    event_store: &EventStore,
) -> MemScopeResult<()>

Export ownership graph analysis to JSON

This function exports the ownership graph including:

• Node information (objects with their types and sizes)
• Edge information (clone relationships)
• Detected cycles (Rc/Arc retain cycles)
• Diagnostics (clone storms, cycle warnings)