Review imaging related assets to refine "assay" annotation

[jaybee84]

Suggested participants:
Aditi Gopalan - for annotation review + update
Adam Taylor - for providing subject matter expertise to understand the right assays if needed.

[aclayton555]

Additional notes:

• Investigate why we have some imaging assay types showing up multiple types in our facet options (note: not specific to imaging assay types, but worth tidying up in this process)

• If refining MC2 imaging assay annotations, consider alignment with updated imaging standards in HTAN2 data model