Report if 2+ usable scans map onto the same RC event
Report if 2+ usable scans map onto the same RC event

In this iteration, this script re-implements the XNAT-to-RC-event
association logic, since it should be independently verifying the
assumptions made by `import_mr_sessions`.

sibis-platform/ncanda-data-integration,sibis-platform/ncanda-datacore,sibis-platform/ncanda-datacore,sibis-platform/ncanda-datacore,sibis-platform/ncanda-data-integration