🌡️ fix: Delete Endpoint Validation, List Index Errors, use PyJWT

[danny-avila]

Summary

I implemented improvements to the delete_documents endpoint and added a MongoDB health check to ensure better validation and connectivity.

• Changed the delete_documents endpoint to use a Pydantic model for better request body validation.
• Fixed the issue where the delete_documents endpoint was incorrectly using query parameters.
• Added a MongoDB health check to ensure database connectivity.
• Refactored the code to use enums for constants, improving readability and maintainability.
• swap python-jose for PyJWT due to security advisories
• add warning that MongoDB Atlas is not querying correctly

Testing

I tested the changes locally by making DELETE requests to the delete_documents endpoint with valid and invalid request bodies to verify the Pydantic model validation. I also monitored the MongoDB health check functionality to ensure it accurately reflects the database status.

Checklist

• [x] My code adheres to this project's style guidelines
• [x] I have performed a self-review of my own code
• [x] I have commented in any complex areas of my code
• [x] I have made pertinent documentation changes
• [x] My changes do not introduce new warnings
• [x] I have written tests demonstrating that my changes are effective or that my feature works
• [x] Local unit tests pass with my changes