fix: restore pdf extra and pin onnxruntime for Python 3.10 compat

- Restore 'pdf' extra in unstructured dependency
- Add onnxruntime pin (>=1.23,<1.24): the 1.24.x series claims >=3.10
  but ships no cp310 wheels; >=1.25 requires Python >=3.11
- Add onnxruntime to file-based extras group
- Regenerate poetry.lock with onnxruntime 1.23.2

Co-Authored-By: AJ Steers <aj@airbyte.io>

Author: devin-ai-integration[bot]