Add pub/sub support for scan insertion

[Nakroma]

I'm submitting a...

• Bug report
• 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:
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Additional Description