feat: add task workflow and asset downloads

lib/server/public-api-response.ts

@@ -0,0 +1,9 @@
+import { jsonError } from "@/lib/server/api";
+import { PublicApiAuthError } from "@/lib/server/public-api-auth";
+import { PublicApiConflictError } from "@/lib/server/public-api-jobs";
+
+export function publicApiError(error: unknown) {
+  if (error instanceof PublicApiAuthError) return jsonError(error.message, error.status);
+  if (error instanceof PublicApiConflictError) return jsonError(error.message, error.status);
+  return jsonError(error);
+}