Add pub/sub support for scan insertion

[Nakroma]

I'm submitting a...

• [ ] Bug report
• [x] Feature request
• [ ] Documentation issue or request

Current behavior

Currently theres no pub/sub on any of the WoW Classic endpoints

Expected behavior

There should be for scan insertions especially. Only problem: How do we manage ~3k item updates per scan?

Minimal reproduction of the problem

Environment

Browser:

• [ ] Chrome (desktop) version:
• [ ] Chrome (Android) version:
• [ ] Chrome (iOS) version:
• [ ] Firefox version:
• [ ] Safari (desktop) version:
• [ ] Safari (iOS) version:
• [ ] IE version:
• [ ] Edge version:

For development issues:

• Node version:
• Operating System:

Additional Description