AT:

• When I create DMN decision table, I can define history time to live with Camunda extension attribute.
• When I deploy DMN decision table, history time to live attribute is saved in the database
  I can update history time to live for already deployed case definitions via Java API and REST API
  Hint:
  Similar functionality exists for Process definition: https://github.com/search?l=Java&p=2&q=org%3Acamunda+historyTimeToLive&type=Code&utf8=%E2%9C%93