SQ elements return wrong VM

SQ elements return wrong VM: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Technically this is understandable as the DICOM Standard doesn't conflate a SQ element's sequence with a non-SQ element's multi-value, but in pydicom they're both represented as…