fix(routes): complete post-refactor dependency wiring cleanup

dashcaddy-api/routes/ca.js

@@ -4,6 +4,7 @@ const fsp = require('fs').promises;
 const path = require('path');
 const { execSync } = require('child_process');
 const { exists } = require('../fs-helpers');
+const { ValidationError } = require('../errors');
 const platformPaths = require('../platform-paths');
 
 module.exports = function(ctx) {