Notes from task breakdown:

• we can respond with an error if the item does not exist in the use case, which means we can fully reuse GetItemStatement

Tasks:

• create a new validator for the use case request (new or adjusted existing one) that contains both the item id and statement id (@Jakob_WMDE creates task)
• return error response in use case when item does not exist (@Ollie.Shotton_WMDE creates task)
• route handler (@Jakob_WMDE creates task)
  • unexpected error handling
  • auth
  • error handling
  • e2e tests
• spec tests (@Ollie.Shotton_WMDE creates task)
• spec (@Jakob_WMDE creates task)

Verified!