ETL: fix user description length that bigger than 65535

Author: hooopo

etl/config/initializers/hn_fetch_user.rb

@@ -35,6 +35,7 @@ def run
       json.delete("submitted")
       json.delete("delay")
       json.merge!(last_fetch_at: Time.now)
+      json['about'] = json['about'].to_s[0,60000]
       HnUser.upsert(json)
     else
       puts "No response"