Only send realtime stats when clients connected

What does this MR do and why?

Check to make sure clients are connected before running through realtime stats collection. This helps with CPU issues - might need to make this configurable in the future for API users.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• Have you checked this doesn't interfere/conflict/duplicate someone elses work?
• Have you fully tested your changes?
• Have you resolved any lint issues?
• Have you assigned a reviewer?
• Have you applied correct labels?