cubicweb #13728492 unique index are not created for non-string column [done]

ahem

priorityimportant
typebug
done in<not specified>
load left0.000
closed by#3e69bccc2022 [sql gen] Properly create UNIQUE index on non string column. Closes #13728492
patch[sql gen] Properly create UNIQUE index on non string column. Closes #13728492 [applied]