[Improvement]: Outline Key Differences Between Database-Based Queue and Redis Pub/Sub

Create a document that outlines the key differences between the current database-based queue system and the Redis Pub/Sub system.

Detail the architectural differences between the two systems, focusing on how they handle message queuing, delivery, and processing.
Highlight potential challenges or risks in moving from the database-based queue to Redis Pub/Sub.
Include a section on the advantages and disadvantages of Redis Pub/Sub in the context of our specific use case.

hngprojects / hng_boilerplate_nextjs