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.

sql/update_oauth_org.sql

@@ -1,3 +0,0 @@
--- UpdateOauthTokenOrg
-UPDATE oauth_token SET arcgis_id = $1, arcgis_license_type_id = $2
-	WHERE refresh_token = $3;