Research: Improve version change for agents

[fredo]

Currently LPs have a very bad UX when a new version is launched. They have to setup a complete new agent and run both instances for a while. Then they need to make sure that the agent withdrew all outstanding funds from the old version. Only then they can tear down the old instance.

It would be nice to have a way which improves this. Ideally they'll only have to update the image and let it run on both instances simultanouesly. This has several problems, as the old agent instances may run on different ABIs and consume different configs. We have to keep that in mind.