Reconstruct all the index

Reconstruct the index of all the tags of all the DICOM instances that are stored in Orthanc. This is notably useful after the deletion of resources whose children resources have inconsistent values with their sibling resources. Beware that this is a highly time-consuming operation, as all the DICOM instances will be parsed again, and as all the Orthanc index will be regenerated. If you have a large database to process, it is advised to use the Housekeeper plugin to perform this action resource by resource