Finish setting up Metabase data model for every table

[jamiew]

I went through and did all the major tables when I set this up originally, but especially the custom views and tables need to have their field types annotated.

Very useful having columns properly labeled as foreign keys, numeric types identified as such, dates, geographies, etc

Here's an example: https://etl.dewi.org/admin/datamodel/database/2/table/87