Function obj_stat 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn obj_stat(
    db: *mut obj_db_t,
    out_stat: *mut obj_stat_t,
) -> obj_error_t

Populate out_stat with a snapshot of the db’s header + collection-count summary.

Safety

• db must be live.
• out_stat must be a writable obj_stat_t *.