API v2 note create

[c8y3]

Implement endpoint POST /api/v2/cases/{case_identifier}/notes to create a note.

• return 201 in case of success
• if the case is not found, return 404
• if the directory does not exist, return 400
• create method in the business layer
• check returned object is uniform with other endpoints
• deprecate POST /case/notes/add
• openapi: document endpoint
• openapi: deprecate POST /case/notes/add

[c8y3]

• add:

      if not cases_exists(case_identifier):
          return response_api_not_found()
  

• document 404 return, when case is not found
• document and test field modification_history in Note

  modification_history:
    type: object
  ...
  modification_history:
    '1711563261.268616':
      user: administrator
      user_id: 1
      action: created note
  

• if the directory belongs to another case, return 400