feat: add external SAM ID support to courses and update API documentation

services/cms-service/migrations/20231219000000_initial_schema.sql

@@ -47,4 +47,4 @@ BEGIN
 END;
 $$ language 'plpgsql';
 
-CREATE TRIGGER update_courses_updated_at BEFORE UPDATE ON courses FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
+CREATE TRIGGER update_courses_updated_at BEFORE UPDATE ON courses FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();