Unexpected silent discard of DICOM objects with invalid AccessionID

[jas88]

Describe the bug

Discovered in HIC Dermatology feed, where a small fraction of data has an AccessionID over 16 characters long which violates the DICOM spec and is incompatible with our SQL schema

To Reproduce

Should be reproducible with any DICOM with a long AccessionID value. May also apply to other tags such as PatientName, also seen elsewhere with CodeMeaning strings in SR objects.

Expected behavior

Either import truncated/redacted, or at least log the fact something is discarded clearly rather than silently ignoring!