[Cirrus] Implement ability to reconstruct the federation from a given height.

[fassadlr]

Currently this needs to be done from before the multisig has been removed.

[quantumagi]

The code seems a bit risky in the way it modifies the existing list of polls while the node is running. Would it be possible to make the changes on a separate list and switch to this list only when done?

Alternatively (or in addition?), one could focus on making the polls repository more robust, similar to other repositories using tips, rewind etc.

[fassadlr]

The code seems a bit risky in the way it modifies the existing list of polls while the node is running. Would it be possible to make the changes on a separate list and switch to this list only when done?

Alternatively (or in addition?), one could focus on making the polls repository more robust, similar to other repositories using tips, rewind etc.

Good points @quantumagi, we definitely need to improve on the polls repo to bring in tips etc. To me this is a OK for now until we do that work. I'm going to add to board.

[quantumagi]

LGTM