feat: Add the serializer and endpoints for the bound samples

• Modify the model
  • Include some missing fields such as created_by, last_edited_by, created_time and last_edited_time.
  • Add some restrictions on the fields data, datalink and sample.
• Modify the admin file to be able to visualize the SampleBoundData
• add the serializer DataBoundSampleSerializer for the SampleBoundData
  • the data was left in the fields to be returned by the APIs as in an id for now until the Data Bound Samples is implemented (Note: the right structure is commented)
• Endpoints Implementations (Note that in all the API a get_the_abject method is used which is a generalization of the Mixins we are using for the get_node and get_workspace, and it allows us to check and get the object if it exists and return the right error response):
  • GET
  • POST
  • DELETE
• In the Create if the sample bound data was already created, 200 in returned with the associated sample (the API specification implies to return a 400 if Sample is already associated with this data)