API documentation showing as integer instead of object in the response

[rathorevaibhav]

Describe the task
In the redoc API documentation that is accessible at host:port/ap1/v1/docs, the foreign key fields are displayed as integers. However, in actual response, that field comes as an object.

API documentation

Expected behavior

1. The API documentation should show the foreign key references as objects and document their attributes as well in the response format.
2. Check for all the foreign keys in every endpoint where we're returning foreign references as objects.