column transformer randomised entries for unique columns

[thorfi]

Is your feature request related to a problem? Please describe.

We have a person table where we have some tables with unique phone numbers and business names that we would like to randomise via pgstream transformer but still have them remain unique.

Describe the solution you'd like

To have a setting:
on_conflict_action: "retry_transformer"
Where if we get a conflict (presumably due to unique index), re-run the transformer and try again?

Describe alternatives you've considered
column transformer option to specify that column as unique and for the transformer to check the target db before applying?

[thorfi]

fpe_ff1 does the job well enough