Replace TWAP with something statistical

[metaproph3t]

Today, autocrat finalizes proposals if the pass TWAP is x% higher than the fail TWAP, where x is currently 5 for MetaDAO. This is non-optimal for large market caps because it imposes a huge bar to proposal passing. For example, if META's market cap is $100MM, a proposal would need to create $5MM of value to pass.

It would be better to use a statistical algorithm so that autocrat was instead making the decision like "I'll accept this proposal if there's a 99.5% chance (P = 0.005) that the market deems it vaue-accretive."