[Feature] Visualize foreign data in registry addition dialog (and/or in DataGrid)

[alexaib2002]

Description

Users should be able to check whether the key they're referencing in the insertion dialog is the actual foreign registry they want to link to.

TODO

• Query the foreign key table to display a data visualization
• (?) Hide unnecessary columns

Depends

List of issues in which this feature depends (may be empty):

• ...