Added async validation

apps/api/src/utils/asyncHandler.ts

@@ -0,0 +1,24 @@
+import type {NextFunction, Request, Response} from 'express';
+
+/**
+ * Method decorator to catch async errors in OvernightJS controllers
+ * Wraps async controller methods to ensure errors are passed to Express error handler
+ *
+ * Usage:
+ * @Post('route')
+ * @CatchAsync
+ * public async myMethod(req: Request, res: Response) { ... }
+ *
+ * This decorator ensures all errors (sync and async) thrown in the method
+ * are caught and passed to the Express error middleware, fixing the hanging
+ * request issue when Zod validation fails.
+ */
+export function CatchAsync(target: any, propertyKey: string, descriptor: PropertyDescriptor) {
+  const originalMethod = descriptor.value;
+
+  descriptor.value = function (req: Request, res: Response, next: NextFunction) {
+    Promise.resolve(originalMethod.call(this, req, res, next)).catch(next);
+  };
+
+  return descriptor;
+}