fix: improve Redis and health check reliability

[samiyonas]

Summary

• Authenticate the BullMQ Redis connection using the configured Redis URL.
• Remove the external docs.nestjs.com request from the application health check.
• Update health-check tests to cover only application dependencies.

Why

BullMQ was connecting to the password-protected Redis instance without authentication,
resulting in NOAUTH Authentication required errors when it issued Redis commands.

The health endpoint also depended on docs.nestjs.com, causing the API to report
unhealthy when external DNS/connectivity was unavailable.

Both changes make the development environment more reliable without changing the
application's core functionality.

[AlexKalll]

That is correct patching, Thank you