We should have a document in our docs folder that describes how change dispatching works. Most important points to cover:

• Information flow: save -> wbchanges table -> change dispatcher -> change handler -> recentchanges, etc
• Coordination: queueing/locking via the wbchanges_dispatch table
• Persistance: the db schema of wbchanges and wbchanges_dispatch
• Usage: how to set and run the maintenance scripts
• Configuration: relevant settings`monospaced text`