Improve add exclusion test

[stavares843]

This PR includes the following:

• Simplified how we run shell commands by using execAsync, which makes the code easier to read and maintain.
• Pulled out repeated values like the Redis port, URL, and exclusion regex into constants, making the code cleaner and reducing hardcoding.
• Added helpful log messages like "Starting Docker container..." and "Monitoring Redis queue..." to make debugging easier and the process more transparent.
• Added a MAX_RETRIES limit to avoid endless loops while waiting for the Redis queue to populate. If it times out, it throws a meaningful error.
• Ensured the Redis connection is always closed in a finally block to avoid leaving resources hanging.
• Replaced the old callback-based approach with execAsync, making it easier to handle errors and promises.