Refactor the data model in the dwh schema

[MattTriano]

I'll flesh out the data model more, but from preliminary work, for my homebuying business logic, the central entity is the parcel, and for my understanding-Cook-County-areas goals, area-based features and aggregations are key so areas will be the central concept.

To produce these areal features aggregations, concepts of interest include:

• amenities (transit stops, grocery stores, restaurants/cafes/coffeeshops, parks, culture),
• access to economic opportunity (high speed internet, professionally relevant neighbors, adjacency to economic opportunities, etc),
• hazards and risks (crime, air pollution, noise pollution, floodplains, etc)