Specify pdfWorker to avoid error from PDF.json

The error got:
> ⨯ Error: Setting up fake worker failed: "Cannot find module '/SOME_PATH/giselles-ai/giselle/.next/server/chunks/ssr/pdf.worker.mjs' imported from /SOME_PATH/giselles-ai/giselle/.next/server/chunks/ssr/node_modules_pdfjs-dist_build_pdf_mjs_c60773._.js".
    at /SOME_PATH/giselles-ai/giselle/.next/server/chunks/ssr/node_modules_pdfjs-dist_build_pdf_mjs_c60773._.js:12706:42
digest: "3292027865"

lib/opentelemetry/wrapper.ts

@@ -4,6 +4,7 @@ import type { LanguageModelUsage } from "ai";
 import type { LanguageModelV1 } from "ai";
 import type { PDFDocumentProxy } from "pdfjs-dist";
 import { getDocument } from "pdfjs-dist";
+import * as pdfWorker from "pdfjs-dist/build/pdf.worker.mjs";
 import type { UnstructuredClient } from "unstructured-client";
 import type { PartitionResponse } from "unstructured-client/sdk/models/operations/partition";
 import type { Strategy } from "unstructured-client/sdk/models/shared";