[FEATURE]: Unit Test Coverage of our Django API Endpoints

[karkir0003]

Feature Name

Unit Test for Django APIs

Your Name

Karthik Subramanian

Description

Writing unit tests with pytest for our Django API Endpoints

Loosely part of this project: https://www.notion.so/9b6766cea0b24060bb10d806d58ee0c1?v=1c2cddea700a478a86e95a5e86c09cf8&p=89819d36b0544586a6c2d3cf38fa5f9a&pm=s

### Tasks
- [x] Unit test for /columns endpoint
- [ ] Unit test for /tabular train endpoint
- [ ] Unit test for /image train endpoint
- [ ] Ensure that pytest is running for training/ unit tests

[github-actions]

Hello @karkir0003! Thank you for submitting the Feature Request Form. We appreciate your contribution. 👋

We will look into it and provide a response as soon as possible.

To work on this feature request, you can follow these branch setup instructions:

1. Checkout the main branch:

```
 git checkout nextjs
```

2. Pull the latest changes from the remote main branch:

```
 git pull origin nextjs
```

3. Create a new branch specific to this feature request using the issue number:

```
 git checkout -b feature-1059
```

Feel free to make the necessary changes in this branch and submit a pull request when you're ready.

Best regards,
Deep Learning Playground (DLP) Team