Move database logic into separate subdirectory

I'm trying to see if this speeds up builds a bit. May not without a
module boundary, but for now it's nice organization to have as the
program grows.

db/sql/update_oauth_org.bob.sql

@@ -0,0 +1,6 @@
+-- Code generated by BobGen psql v0.41.1. DO NOT EDIT.
+-- This file is meant to be re-generated in place and/or deleted at any time.
+
+-- UpdateOauthTokenOrg
+UPDATE oauth_token SET arcgis_id = $1, arcgis_license_type_id = $2
+	WHERE refresh_token = $3;