This guarantees stability when a gov proposal adds a new token and a new
market in one transaction. This way the RegisterMarket instruction knows
exactly what index the new token will have.
Previously, the new token index was generated automatically, meaning
you couldn't be sure what index a new token would get in advance.
- withdraw and deposit may deactivate positions explicitly
- adjusting bank positions may collect dust for positions between
0 and 1 native tokens
- health check always assumes all active and new banks/oracles are
passed
Christian Kamm