Add Philips_4D_DICOM.dcm (bafybeifuox5czfoft3ulqvcqpoeo7vvfusmhh23yu5n5ia4fpvxuegg7yq)

56 MB blob mirrored above the 50 MB threshold at maintainer request.
Content-link migrated from .sha512 in f3899ce8c6 but the CID blob was
never mirrored. Bytes verified against the historical SHA512; CID
re-verified with ipfs-car (unixfs-v1-2025).

Author: hjmjohnson