chore: adds tsvector to members

lib/membership/member.ex

@@ -166,6 +166,8 @@ defmodule Mv.Membership.Member do
     attribute :postal_code, :string do
       allow_nil? true
     end
+
+    attribute :search_vector, AshPostgres.Tsvector, writable?: false, public?: false, select_by_default?: false
   end
 
   relationships do