add explanatory comment

dbt_project.yml

@@ -30,6 +30,11 @@ clean-targets: # directories to be removed by `dbt clean`
 # files using the `{{ config(...) }}` macro.
 models:
   +unlogged: true
+  # ^ This makes all the tables created by dbt be unlogged. This is a Postgres
+  # specific setting that we activate for performance. It has deep implications
+  # on how Postgres handles tables and is typically considered crazy risky, but
+  # it's very fitting for our needs. You can read more here:
+  # https://www.crunchydata.com/blog/postgresl-unlogged-tables
   dwh_dbt:
     staging:
       +materialized: table