Handle reorg outside of confirmation range

[AuHau]

The EventsEmitter can emit reorgOutOfRange event which specifies that reorg happened outside the confirmation range, which tells us that there is a possibility that our current state is invalid.

We have to handle this edge-case somehow. Generally, the solution is to rebuild the state, there are two approaches how to do that:

1. Notify Devops that this happened with email, but this requires to implement mailing support - bleh.
2. Automatically rebuild the database. This will be complex though as the precache can take long time to run, so we would want to make some sort of "precache on different DB file" and then swap them. But even then this might give some problems.

[AuHau]

Closed with #273