Function architect_prepare_csv_page_bindings 

fn architect_prepare_csv_page_bindings(
    app: &AppRuntime,
    store: &ArchitectStore,
    task_id: i64,
    actor_id: i64,
    generated_root: &Path,
    brief: &str,
) -> Result<(), String>

Applies explicit CSV/page/image requests through the ordinary owner-checked source transaction.