Fields request in topic entity

[larb26656]

Current topic is missing some field that are displayed in the web app ui including

• code
  Objective
  • Allows users to track requests via a unique code
  • Users prefer readable and human-friendly topic codes
• countOfMessagesGroup
  Objective
  • Allows users to track the number of message groups in this topic
  • A high number of message groups may indicate high demand, so the admin should respond as soon as possible