Given an instance of InsertionModel, example below, generates an insertion query and fills in foreign keys automatically after getting from the DB.

Creates an insertion query from an insertion model.

Creates a transformer config by pulling values from configuration environment.

Gets or creates the FK for the key/values supplied, and inserts the resulting ID into the columnToValue mapping.

Stores memoised insertion queries to minimise computation.

TODO purge when everything moved to vDB interface.