[BETA] Demand Planning Refactor

Previously, the way demand planning worked is that whenever something changed that impacted demand, Fulcrum would run an update to that information and recalculate the new demand. This meant there was a delay between the update itself and what showed in demand planning, and required a complex calculation for every change.

Now that Fulcrum uses SQL, the data in demand planning can be efficiently calculated live - no more waiting for the calculations to refresh!