Value sets

[KGOH]

I need to specify that some value may be not just a :enum but some reusable and bigger set of possible values, size of a such value set may reach up to a million values.

Use-case:
A key with possible values from ICD-10

diagnosis-concept
{:zen/tags #{zen/schema}
 :value-set {:sym icd10, :keys #{:code :display}} 
 :type zen/map
 :keys {:code {:type zen/string}
        :display {:type zen/string}}}

diagnosis-code
{:zen/tags #{zen/schema}
 :value-set {:sym icd10, :value :code} 
 :type zen/string}

Urgency: high
Currently I need to implement this as a zen extension making my zen schemas not shareable