fix(server): handle failed ML responses (#4036)

* handle ml error responses

* more explicit error message

* formatting

* better formatting

server/src/infra/repositories/machine-learning.repository.ts

@@ -18,6 +18,12 @@ export class MachineLearningRepository implements IMachineLearningRepository {
   private async post<T>(url: string, input: TextModelInput | VisionModelInput, config: ModelConfig): Promise<T> {
     const formData = await this.getFormData(input, config);
     const res = await fetch(`${url}/predict`, { method: 'POST', body: formData });
+    if (res.status >= 400) {
+      throw new Error(
+        `Request ${config.modelType ? `for ${config.modelType.replace('-', ' ')} ` : ''}` +
+          `failed with status ${res.status}: ${res.statusText}`,
+      );
+    }
     return res.json();
   }