Upsertion endpoint

[skks1212]

Currently we are upserting data through python manage.py upsert. Let us create an endpoint to upsert.

First, create a new Project model, that will contain title, description and user. Inherit from Base Model. Now create relevant serializers and viewset for CRUD operations.

Create a Document model. A Document belongs to a Project (many to one). It should contain title, description and file. Create relevant serializers and viewsets for CRUD. Make sure that the POST method accepts formdata. File cannot be updated, only title and description can.

the url should look like /projects/<project_id>/documents/<document_id>

Now once a file gets uploaded, perform the same upsert logic as present, but use the external_id of the Project as the namespace for Pinecone.

[skks1212]

@siddnikh what's the status on this?