chore: restore pdfjs-dist dependency in package.json

- Re-added pdfjs-dist version 4.10.38 to package.json to ensure PDF rendering functionality is available.

package.json

@@ -64,7 +64,6 @@
     "@strongtz/win32-arm64-msvc": "^0.4.7",
     "jsdom": "26.1.0",
     "os-proxy-config": "^1.1.2",
-    "pdfjs-dist": "4.10.38",
     "selection-hook": "^0.9.23",
     "turndown": "7.2.0"
   },
@@ -182,6 +181,7 @@
     "officeparser": "^4.1.1",
     "openai": "patch:openai@npm%3A5.1.0#~/.yarn/patches/openai-npm-5.1.0-0e7b3ccb07.patch",
     "p-queue": "^8.1.0",
+    "pdfjs-dist": "4.10.38",
     "playwright": "^1.52.0",
     "prettier": "^3.5.3",
     "proxy-agent": "^6.5.0",